I love how Dr. Grande explains ALL of the results on the output from the ANOVA and post hoc. It really helps to solidify understanding how and why we run the statistical tests we run and what the results actually mean. For example, taking the extra step to explain that there was no statistically significant different between CBT and existential.
Thank you for sharing this video Dr. Grande. I used this type of testing for my senior thesis in undergraduate. I appreciated how it shows each groups significance compared to the control and experimental group. It was easier to understand and work through the information, especially when you are not confident in understanding the statistics.
Prof. Grande has maintained the balance in his videos. He touches all the points, at the same time goes very focused and fast. Whenever I am searching for any video on statistics, my eyes search for where is Prf. Grande's video.
Thank you for this video! Very easy-to-follow video about assessing differences between two treatment groups and a control using a one-way ANOVA. I enjoy that you always run through what the statistics actually mean with respect to the test and significance.
I have taken a statistics and research methods class in undergraduate school which is why I remember a lot of the terms that you are talking about. However, I forget a lot of their meanings and how you determine the results. I'm looking forward to being able to read the data again and know when their is a significant difference. I also really liked the use of the Mean Plot. I have never used that before and seeing a visual plot presentation of the data made it easier to understand what you were talking about.
I chose to watch this video because I'm narrowing down my methodology for a research project...this helped greatly in assessing what I need test-wise in comparing three groups with different independent variables. Thank you!
I too am trying to figure out which statistics to use for my project. While I do not think I will use this one, this video has contributed a bit to my overall understanding of ANOVA
Having little to no understanding of SPSS and the material being presented, I was confused at times by the information given. However, as someone who is unfamiliar with the material, I found the visual presentation to be helpful and easy to follow, allowing me to get the gist of how to properly perform a one-way ANOVA. With more practice, I find that I will gain a better understanding of the information.
It was interesting that the ANOVA can tell you if there is a significant difference between groups. However, one must interpret the post hoc test in order to see where the difference. SPSS makes this very simple and I'm glad Dr. Grande shows us two ways to get these results and some additional tests.
I remember doing ANOVAs in undergrad and I faintly remember liking them because I understood them at the time. Many things go over my head now, so to fully understand, and not mess up if I do it myself, I would need to watch the video a few times to feel comfortable, although this video did a great job with explanations. Although it was a lot of information, it was all beneficial information.
One way ANOVA's seem to be used a lot in research and it was interesting to learn how to run this test in two different ways. I had learned the first way in undergraduate and was excited to see that there are multiple ways to run a One way ANOVA. Multiple options are always great!
I vaguely recall running these tests during my undergraduate research course, but was slightly confused. I recognized a few of the functions and felt the video did a good job demonstrating various ways to analyze and view data; however, I think further hands-on practice in SPSS would be the best way for me to fully understand these functions.
Thank you for posting about the Brown-Forsyth and the Welch in the next video, it helped to further understand this video. Also, I appreciated seeing the two ways to run a one-way ANOVA, although the first example seems the more obvious choice.
Admittedly I am a nerd and ANOVA's are probably my favorite analysis to run. I like ANOVA's because, you can compare the means of more than just two samples which is really helpful for most research projects. Again, this video served as a good reminder to me of how to interpret the read out from SPSS Great video!
Mandy Moore I vaguely remember ANOVA, but still don't exactly know what it is..... I know that it is helpful, but to understand things I need to know what they are and for this, I'm still lost on that.
This video presented a lot of information in a short period of time which made it a little bit confusing, however I appreciated the description of how to find the statistical difference.
Use one way ANOVA to compare differences in scores between groups and use post hoc to see where the differences are. Thank you for the video Dr. Grande.
This video showed a lot of information. I think it is interesting how many different statistics are shown after running the test. The hard part for me will be remembering what all of the statistics mean and what they represent.
Rachel Foster There was a lot of information covered in this video that I did not understand. It is hard to follow at times since I am not familiar with SPSS. I like how the results are shown and and can be computed so simple, but if I don't understand how the information is computed it does me no good.
Bethany Elstrom I also need a refresher on the meaning of terminology and uses. Also, the new SPSS looks so very different that I would need to re-learn it all over again. The videos are helpful for that.
There was a lot of information in this video surprisingly all packed in the 7 minute video. It was interesting to see all the explanations spelled out and seeing it in action.
The speed of the results in both Excel and SPSS are astounding... hard to believe how quickly it runs these tests. So I've learned that an ANOVA test will tell you if there is a "between group" difference but the Post Hoc results show you where the difference is. Also, you have to have statistically significance in your ANOVA analysis in order to interpret a Post Hoc test. Still trying to wrap my head around all of this :)
Kimberly Hanna Yes, SPSS and Excel are great tools and it would be odd for anyone not to use these if they are doing a lot of statistical analyses. Of course, one must understand these tests so it is good that we have these videos to explain what the tests mean!
I can see this formula being very useful in research when comparing two treatments. I would hopefully be able to use it during my hypothetical research.
Susan Wilder It does look helpful, but I'm still not completely clear how this works... I don't think I know it well enough to use it on my research proposal.
Dr. Grande, hope you could make a book in SPSS with details such as in the video. I have learned a lot from this and it helped me in my results and interpretation in my dissertation paper.
I really hope that you will consider producing some updated videos for SPSS Version 25; as some of the menu options have now changed ; for example Levene's Test now displays four different statistics: based on mean; based on median; based on median and with adjusted df; and based on trimmed mean. Also, tests for heteroscedasticity are now available from the menu system in Univariate analysis.
This video was helpful ans I was able to understand ANOVA one way better.i also had a more clear understanding of the different levels that are being measured and compared .
The chart with the line graph that was labeled "mean of posttest" was the easiest chart for me to visualize and to understand the differences in scores between the control group, CBT group, and Existential group. This is probably due to the fact that looking at numerical data tends to confuse me. I also found the second method of performing a one-way ANOVA and interpreting the post hoc test results to be easier and quicker.
I am still struggling to determine when the best time to use the ANOVA is. This video helped with the steps and the process but I could use more help on recognizing when.
I remembered the term ANOVA but it will be difficult to recall all of these terms and their meaning. This video was jam packed with good content, however again I need a deeper refresher I believe.
I did not remember any of the ANOVA and Post Hoc Testing. This was a lot of information to take in and comprehend. I would need a lot of hands on to use this, but I did see the significance of the results and the analysis that was provided.
Bethany Elstrom I did not learn about ANOVA and Post Hoc Testing in undergrad. For me, this was new information and I found myself lost. Like you, I did see the significance of the results, yet found myself wondering how Dr. Grande came up with the data.
I also did not remember what the purpose of using ANOVA and Post Hoc Testing in the video were for. I was confused with the multiple presentation of charts at once. Hopefully, watching more videos that explain ANOVA and other important research concepts used in SPSS will help me to understand the information.
ANOVA and Post Hoc are new to me. It would have been helpful to learn more about this in class first and then perhaps watched the video. It was difficult for me to understand -- perhaps because it was a lot of information at once.
This is also very new to me, and I agree that it would have been helpful to discuss it in class first. Everything was difficult for me to understand, except the line chart labeled "mean of post test" to understand the different scores. I thought the second method of steps to follow in order to interpret the Anova and Post Hoc results were quicker and easier to follow.
Very powerful and a lot seems to be going on. Are there any checks, factors or rules regarding selecting the various options in the options dialogue box and the post hoc dialogue box?
There is a lot of information that was shared in this video. Some things I feel like I understood and some other things were really confusing. I am pretty unfamiliar with ANOVA so some things went over my head. I think that I may need to revisit this video again in order to try to grasp more of these concepts. I can see why it is useful to use the one way ANOVA and Post Hoc tests when conducting research, I just need to be able to put it into context.
Melissa Clendaniel I've noticed that any video with ANOVA tends to go over my head as well. I tried watching this video and left with more questions than answers.
I agree with you Melissa, I am very new to this so I got a bit confused. But think once I learn more about this process revisiting the video will be much more helpful.
I was very confused!!! I am not familiar with the ANOVA function. However, using SPSS to organize the data seemed user friendly. Also the SPSS table made the data much more easier to understand. Finding the statistical difference between levels of independent variables seemed pretty straightforward using SPSS.
I was a little lost in following this video, I think I struggled with just trying to keep up with what was going on and the purpose of it all. The separation of the data, having it in its own boxes helps to compare and contrast data. I like that you can have multiple samples, this would be beneficial in research in order to see what treatment was most effective.
Candace Fernandez Yes, definitely confusing! But I think with further practice we could figure it out. And it's certainly useful to have this video provide step-by-step instruction!
Candace Fernandez I agree with you. I can see the information being very helpful, but it is also difficult to remember what each statistic stands for and how it is used. There was a lot of information being shared in the video, which was overwhelming when confused by the statistics.
Sometimes we want to look at more than two groups of data and compare them. The one way ANOVA does that for us. I guess Post Hoc test explore additional differences among means.
Danielle Maldonado I feel the same way! I think I will need to watch this video again and maybe take notes this time around. I understand the basics but some things went over my head.
I like ANOVA, even though I don't know exactly what it is, because it gets rid of things that are necessarily vital to the results I want to get, It doesn't skew the results, to my understanding, but it does give you the significant results so that we know what we are looking at and know what our results mean to our hypothesis. I need some more clarity of what ANOVA really is and all it does, but I realize that it is a very important tool that is invaluable to researchers. Is ANOVA just the name of the test to show statistical significance? Or is it some sort of data point acronym? I guess I just want the basics of what it is to understand it better.
Sir, Thanks a lot for the video. But I have a question. If the number of observations in each group differs what test to be used for post hoc analysis?
Way over my head so far... These are becoming somewhat clearer, but there are a lot of terms used on her that make this difficult to follow. I think I got lost right around 1:05 lol. Hopefully things start to clear up after the other videos.
I have 10 measured Toluene concentrations from 10 sampling points. P1-156.4 mg/kg P2-128.2 mg/kg P3-1201.45 mg/kg P4-1125.1 mg/kg P5-1225.85 mg/kg P6-879.23 mg/kg P7-458.8 mg/kg P8-695.5 mg/kg P9-205.36 mg/kg P10-1552.3 mg/kg The recommended Dutch Intervention Value for Toluene in soils is 130mg/kg Which statistical test can i use to show whether there is a statistical significance between the measured concentrations and the Dutch Intervention Value?
This video left me completly confused. I attempted to comprehend the information in the video, but this happens to be one of the concepts that I don't fully understand.
Oh wait I have a question. Why is CBT more effective than Existential according to the graphic in 4:50? What did it base on? And for the post hoc test, what is the difference between Tukey and Duncan test? I used Duncan test but after seeing your explanation I think I could use Tukey test as well, I'm just a little bit confused on how to interpret it. Thank you.
Your videos are valuable sir..but i have one doubt..is there a non parametric equivalent for two way anova and what are the posthoc tests to be used for kruskalwallis test. Thank you in advance
Nice I like ANOVA because, you can compare more than two mean using Turkey's HSD, but to differentiate one mean from other people use superscript like a,b,c etc . whould you explain this?
This may work on my data. I am struggling trying to figure out what test I would use to interpret the data I would be collecting. I am comparing to groups using the Quality of Life scale, which measures compassion satisfaction, compassion fatigue, and burnout. I would like to see if there is a statistical difference between the two groups.The scale states you could use an ANOVA or t test.
Could you explain about the overlap of confidence intervals? If I am not mistaken, the difference between the control and the existential groups are not valid since their confidence intervals overlap as seen in the descriptives section. Is that right?
To be honest, I had to rewind the video twice and I am still struggling following along. There is just so many things going on and so many concepts at once that it isn't as simple and easy to follow than the previous videos. I think if I had SPSS, it would be easier to understand.
Hi, I observed that in natural sciences some people perform Anova and Tukey tests with a very small sample sizes (7 to 15 per group) how to justify that? I’m a researcher in Management and social science and in my field, sample size should be at least 30 per group! Otherwise, small sample size violate the assumptions of using Anova (normality)! It’s rather T tests that should be used.. no?
what if you have 80 patients divided in 3 groups: 20 controll, 30 group1, 30 group2, which posthoc test should one use....does the lower control group affect the selecetion of post hoc test
Prof. at one place you have said that for equal no. of people we should use Tukey. I have unequal no. of people in my research, so which test to use? Thanks.
Hello Prof. Can i do one way Anova with individual Likert items (Measured on 5 point scale), which are part of a formative construct in my study? I am confused whether i can go with ANOVA, as Likert items are ordinal in nature. Request you to please clarify and provide an appropriate reference.. Regards, Karan
I have a question: I used one-way ANOVA to test one of my demographic which is marital status and the dependent variable is workplace bullying. I got one group (married-divorced) that have a sig difference after looking at post hoc but I dont know how to interpret it. should I say there is a significant difference between married and divorced people who are exposed to workplace bullying? then when I go back to the descriptive table to see the mean I only look for these two categories or all the groups?
Can two or more independent categorical and/or ordinal variables each having more than two labels (say 3 or 4....) be tested with one dependent scale variable by SPSS?
hi. thank you for the video :) may I know how to change the confidence interval when testing the anova? we can just change the sig level for post hoc in post hoc window... but what about the anova?
hi sir, I was testing some financial data using Kruskal Wallis H Test. The test result says its significant but I am getting H statistic/ Chi sque value very very large compared with the others studies in the same field. Did i do something wrong, m i on right track. plz suggest me ???
Sir my data size is under the thirty and likert scale data one to five.i collect this data for four type of people how to analyse my data.i use anvoa or other??
Brittany Vodzak Agreed. SPSS seems more straightforward but maybe it's just because it is more aesthetically pleasing than Excel. I'm still trying to figure all of this out. Not comfortable with how to explain ANOVA... I can memorize these things but am having a hard time absorbing these concepts.
Sir i ve a query Suppose I am comparing scores of three independent groups say X Y Z on a particular variable. Suppose before running ANOVA i want to check normality of my sample. If i ve to check normality of scores in each group separately or all together?? Secondly, if i checked normality of each group separetly, and suppose i found that scores of one group is not normaly distributed but other two had or vice versa.. how shud I proceed in this case?
Hi Doc Thank you for this video. I want your opinion if you could help me please. I have 10 variables and I need to check the interaction between them. each variable has around ten (x and y) points. I tried the scatter chart and best fit line but R is so low. that is why I need to find another way to check the interaction. do you have any suggestions ? thanks in advance
![One-Way ANOVA [Analysis of Variance] simply explained](/img/n.gif)
Thank you Dr. Grande this saved my butt in a lab where no one bothered to show us anything about SPSS. Much appreciated!!!
I love how Dr. Grande explains ALL of the results on the output from the ANOVA and post hoc. It really helps to solidify understanding how and why we run the statistical tests we run and what the results actually mean. For example, taking the extra step to explain that there was no statistically significant different between CBT and existential.
Thank you for sharing this video Dr. Grande. I used this type of testing for my senior thesis in undergraduate. I appreciated how it shows each groups significance compared to the control and experimental group. It was easier to understand and work through the information, especially when you are not confident in understanding the statistics.
Prof. Grande has maintained the balance in his videos. He touches all the points, at the same time goes very focused and fast. Whenever I am searching for any video on statistics, my eyes search for where is Prf. Grande's video.
Thank you for this video! Very easy-to-follow video about assessing differences between two treatment groups and a control using a one-way ANOVA. I enjoy that you always run through what the statistics actually mean with respect to the test and significance.
I have taken a statistics and research methods class in undergraduate school which is why I remember a lot of the terms that you are talking about. However, I forget a lot of their meanings and how you determine the results. I'm looking forward to being able to read the data again and know when their is a significant difference. I also really liked the use of the Mean Plot. I have never used that before and seeing a visual plot presentation of the data made it easier to understand what you were talking about.
I chose to watch this video because I'm narrowing down my methodology for a research project...this helped greatly in assessing what I need test-wise in comparing three groups with different independent variables. Thank you!
I too am trying to figure out which statistics to use for my project. While I do not think I will use this one, this video has contributed a bit to my overall understanding of ANOVA
Having little to no understanding of SPSS and the material being presented, I was confused at times by the information given. However, as someone who is unfamiliar with the material, I found the visual presentation to be helpful and easy to follow, allowing me to get the gist of how to properly perform a one-way ANOVA. With more practice, I find that I will gain a better understanding of the information.
It was interesting that the ANOVA can tell you if there is a significant difference between groups. However, one must interpret the post hoc test in order to see where the difference. SPSS makes this very simple and I'm glad Dr. Grande shows us two ways to get these results and some additional tests.
Very helpful. Seeing SPSS run ANOVA with all the post hoc tests was great. the interpretation of the data was extremely useful for me.
This video is a great addition to the book's explanation. It was very helpful. Thank you.
I remember doing ANOVAs in undergrad and I faintly remember liking them because I understood them at the time. Many things go over my head now, so to fully understand, and not mess up if I do it myself, I would need to watch the video a few times to feel comfortable, although this video did a great job with explanations. Although it was a lot of information, it was all beneficial information.
I particularly appreciated seeing the two different ways to run the ANOVA and an explanation of the output differences.
One way ANOVA's seem to be used a lot in research and it was interesting to learn how to run this test in two different ways. I had learned the first way in undergraduate and was excited to see that there are multiple ways to run a One way ANOVA. Multiple options are always great!
I agree. It is helpful to learn the multiple options to run a One way ANOVA.
Very useful video. Understood the application of ANOVA in quick time in the crucial period of my research work. Thanks a lot for uploading it.
I vaguely recall running these tests during my undergraduate research course, but was slightly confused. I recognized a few of the functions and felt the video did a good job demonstrating various ways to analyze and view data; however, I think further hands-on practice in SPSS would be the best way for me to fully understand these functions.
clear and it covers all the main points. Thank you!
Thank you for posting about the Brown-Forsyth and the Welch in the next video, it helped to further understand this video. Also, I appreciated seeing the two ways to run a one-way ANOVA, although the first example seems the more obvious choice.
Admittedly I am a nerd and ANOVA's are probably my favorite analysis to run. I like ANOVA's because, you can compare the means of more than just two samples which is really helpful for most research projects. Again, this video served as a good reminder to me of how to interpret the read out from SPSS Great video!
Mandy Moore Yes! I have heard of Anova but do not remember much from my undergrad degree. I have to relearn how to do this!
Mandy Moore ANOVA is great! It kicks out so many results to interpret and is so useful and efficient!
Mandy Moore I vaguely remember ANOVA, but still don't exactly know what it is..... I know that it is helpful, but to understand things I need to know what they are and for this, I'm still lost on that.
This video presented a lot of information in a short period of time which made it a little bit confusing, however I appreciated the description of how to find the statistical difference.
The interpretation throughout the video was helpful in understanding the ANOVA and Post Hoc test.
Thank you Doctor for your brief explanation on one-way ANOVA. It is very helpful video!
Use one way ANOVA to compare differences in scores between groups and use post hoc to see where the differences are. Thank you for the video Dr. Grande.
Took notes, got clarity on post hoc tests and assumptions. Thank You.
The demonstration of how to run the data in two ways and interpret the output is helpful for visual learners.
This video was very helpful in helping me determine what type of test I will need to use. I now know ANOVA is not the test I will be using.
hello Tammy witzke
This video was very helpful
in helping me
This video showed a lot of information. I think it is interesting how many different statistics are shown after running the test. The hard part for me will be remembering what all of the statistics mean and what they represent.
Rachel Foster There was a lot of information covered in this video that I did not understand. It is hard to follow at times since I am not familiar with SPSS. I like how the results are shown and and can be computed so simple, but if I don't understand how the information is computed it does me no good.
Bethany Elstrom I also need a refresher on the meaning of terminology and uses. Also, the new SPSS looks so very different that I would need to re-learn it all over again. The videos are helpful for that.
There was a lot of information in this video surprisingly all packed in the 7 minute video. It was interesting to see all the explanations spelled out and seeing it in action.
You are a legend, you helped a lot and you explained it really great!
The speed of the results in both Excel and SPSS are astounding... hard to believe how quickly it runs these tests. So I've learned that an ANOVA test will tell you if there is a "between group" difference but the Post Hoc results show you where the difference is. Also, you have to have statistically significance in your ANOVA analysis in order to interpret a Post Hoc test. Still trying to wrap my head around all of this :)
Kimberly Hanna Yes, SPSS and Excel are great tools and it would be odd for anyone not to use these if they are doing a lot of statistical analyses. Of course, one must understand these tests so it is good that we have these videos to explain what the tests mean!
Kimberly Hanna I did grasp that there must be a significant difference in order to interpret the HOC test.
I will have to take notes and have a reference sheet for the next time I watch this video. So much information in so little time!
I agree there is plenty of information. I like your idea it would definitely help to better understand.
Nice step by step approach. Also like to see the two ways to run these stats. using ANOVA and General Linear Mode/Univariatel.
Again, seeing this done with real data is helpful. Thanks!
I can see this formula being very useful in research when comparing two treatments. I would hopefully be able to use it during my hypothetical research.
Susan Wilder It does look helpful, but I'm still not completely clear how this works... I don't think I know it well enough to use it on my research proposal.
Good explanation of 1-way anova and post hoc interpretation.
Thank you Dr. Todd and please describe about Duncan post hoc test.
Dr. Grande, hope you could make a book in SPSS with details such as in the video. I have learned a lot from this and it helped me in my results and interpretation in my dissertation paper.
I really hope that you will consider producing some updated videos for SPSS Version 25; as some of the menu options have now changed ; for example Levene's Test now displays four different statistics: based on mean; based on median; based on median and with adjusted df; and based on trimmed mean. Also, tests for heteroscedasticity are now available from the menu system in Univariate analysis.
thanks this video is very helpful to me
it's helped with my final tests
You're welcome - thanks for watching.
This video was helpful ans I was able to understand ANOVA one way better.i also had a more clear understanding of the different levels that are being measured and compared .
Thank you- this was a very helpful intro to ANOVA.
Genius Dr. Grande thanks very much
The chart with the line graph that was labeled "mean of posttest" was the easiest chart for me to visualize and to understand the differences in scores between the control group, CBT group, and Existential group. This is probably due to the fact that looking at numerical data tends to confuse me. I also found the second method of performing a one-way ANOVA and interpreting the post hoc test results to be easier and quicker.
It's helpful to see it all spelled out like this.
I am still struggling to determine when the best time to use the ANOVA is. This video helped with the steps and the process but I could use more help on recognizing when.
I remembered the term ANOVA but it will be difficult to recall all of these terms and their meaning. This video was jam packed with good content, however again I need a deeper refresher I believe.
Alaina Van Gelder yes i agree
You are the best!
I did not remember any of the ANOVA and Post Hoc Testing. This was a lot of information to take in and comprehend. I would need a lot of hands on to use this, but I did see the significance of the results and the analysis that was provided.
Bethany Elstrom I did not learn about ANOVA and Post Hoc Testing in undergrad. For me, this was new information and I found myself lost. Like you, I did see the significance of the results, yet found myself wondering how Dr. Grande came up with the data.
Bethany Elstrom I was thinking the same thing. I had to go look up both terms then the video made a little more sense to me.
I also did not remember what the purpose of using ANOVA and Post Hoc Testing in the video were for. I was confused with the multiple presentation of charts at once. Hopefully, watching more videos that explain ANOVA and other important research concepts used in SPSS will help me to understand the information.
Thank you this is helpful. Life saver!
ANOVA and Post Hoc are new to me. It would have been helpful to learn more about this in class first and then perhaps watched the video. It was difficult for me to understand -- perhaps because it was a lot of information at once.
This is also very new to me, and I agree that it would have been helpful to discuss it in class first. Everything was difficult for me to understand, except the line chart labeled "mean of post test" to understand the different scores. I thought the second method of steps to follow in order to interpret the Anova and Post Hoc results were quicker and easier to follow.
Very powerful and a lot seems to be going on. Are there any checks, factors or rules regarding selecting the various options in the options dialogue box and the post hoc dialogue box?
There is a lot of information that was shared in this video. Some things I feel like I understood and some other things were really confusing. I am pretty unfamiliar with ANOVA so some things went over my head. I think that I may need to revisit this video again in order to try to grasp more of these concepts. I can see why it is useful to use the one way ANOVA and Post Hoc tests when conducting research, I just need to be able to put it into context.
Melissa Clendaniel I've noticed that any video with ANOVA tends to go over my head as well. I tried watching this video and left with more questions than answers.
I agree with you Melissa, I am very new to this so I got a bit confused. But think once I learn more about this process revisiting the video will be much more helpful.
+Anna Ornelas
hello friend I am like this
very nice you
I was very confused!!! I am not familiar with the ANOVA function. However, using SPSS to organize the data seemed user friendly. Also the SPSS table made the data much more easier to understand. Finding the statistical difference between levels of independent variables seemed pretty straightforward using SPSS.
***** I agree that SPSS seems to be user friendly but I am having trouble understanding what an ANOVA does.
I agree it is confusing. I think I read someone else say and I am with them, I don't know if I know what I need to know about this.
Sherrie Tilghman Yes confusing
Thanks, very clear and concise.
I was a little lost in following this video, I think I struggled with just trying to keep up with what was going on and the purpose of it all. The separation of the data, having it in its own boxes helps to compare and contrast data. I like that you can have multiple samples, this would be beneficial in research in order to see what treatment was most effective.
Candace Fernandez Yes, definitely confusing! But I think with further practice we could figure it out. And it's certainly useful to have this video provide step-by-step instruction!
Candace Fernandez I agree with you. I can see the information being very helpful, but it is also difficult to remember what each statistic stands for and how it is used. There was a lot of information being shared in the video, which was overwhelming when confused by the statistics.
+Jacklin Skibicki I agree. It was just too much information at one time.
Candace Fernandez yes, confusing to follow.
Thank you Mr. Grande. this is very helpfull
You're welcome!
Sometimes we want to look at more than two groups of data and compare them. The one way ANOVA does that for us. I guess Post Hoc test explore additional differences among means.
Wow! A lot of information packed in an, almost, eight minute video. So, I am finding it difficult remembering what everything stands for.
Danielle Maldonado I feel the same way! I think I will need to watch this video again and maybe take notes this time around. I understand the basics but some things went over my head.
I like ANOVA, even though I don't know exactly what it is, because it gets rid of things that are necessarily vital to the results I want to get, It doesn't skew the results, to my understanding, but it does give you the significant results so that we know what we are looking at and know what our results mean to our hypothesis. I need some more clarity of what ANOVA really is and all it does, but I realize that it is a very important tool that is invaluable to researchers. Is ANOVA just the name of the test to show statistical significance? Or is it some sort of data point acronym? I guess I just want the basics of what it is to understand it better.
Hello,
Thank you for this insightful video.
Please, what Post Hoc test do I use for groups aren't the same size?
did you find the answer? want to know as well
Sir,
Thanks a lot for the video. But I have a question. If the number of observations in each group differs what test to be used for post hoc analysis?
Bonferroni's test
Way over my head so far... These are becoming somewhat clearer, but there are a lot of terms used on her that make this difficult to follow. I think I got lost right around 1:05 lol. Hopefully things start to clear up after the other videos.
I have 10 measured Toluene concentrations from 10 sampling points.
P1-156.4 mg/kg
P2-128.2 mg/kg
P3-1201.45 mg/kg
P4-1125.1 mg/kg
P5-1225.85 mg/kg
P6-879.23 mg/kg
P7-458.8 mg/kg
P8-695.5 mg/kg
P9-205.36 mg/kg
P10-1552.3 mg/kg
The recommended Dutch Intervention Value for Toluene in soils is 130mg/kg
Which statistical test can i use to show whether there is a statistical significance between the measured concentrations and the Dutch Intervention Value?
Thank you for this helpful video
Do you have a video where the samples are not equal? So the homogeneity variance in this case will be significant. Can I still use ANOVA?
i can't include my string variable to the analysis. How?
This video left me completly confused. I attempted to comprehend the information in the video, but this happens to be one of the concepts that I don't fully understand.
This viseo was very helpful thanks ! What kind of test do i have to interpret when Levene Test is sigificant ? Thanks a lot!
ANOVA is a great tool in comparing more than on sample however understanding SPSS in another matter all together, it is confusing for me.
Oh wait I have a question. Why is CBT more effective than Existential according to the graphic in 4:50? What did it base on?
And for the post hoc test, what is the difference between Tukey and Duncan test? I used Duncan test but after seeing your explanation I think I could use Tukey test as well, I'm just a little bit confused on how to interpret it. Thank you.
Your videos are valuable sir..but i have one doubt..is there a non parametric equivalent for two way anova and what are the posthoc tests to be used for kruskalwallis test. Thank you in advance
Nice I like ANOVA because, you can compare more than two mean using Turkey's HSD, but to differentiate one mean from other people use superscript like a,b,c etc . whould you explain this?
How do I reference your work?. I do not see your journal articles
This may work on my data. I am struggling trying to figure out what test I would use to interpret the data I would be collecting. I am comparing to groups using the Quality of Life scale, which measures compassion satisfaction, compassion fatigue, and burnout. I would like to see if there is a statistical difference between the two groups.The scale states you could use an ANOVA or t test.
Could you explain about the overlap of confidence intervals? If I am not mistaken, the difference between the control and the existential groups are not valid since their confidence intervals overlap as seen in the descriptives section. Is that right?
THANK YOU Dr.
Thank you so much
To be honest, I had to rewind the video twice and I am still struggling following along. There is just so many things going on and so many concepts at once that it isn't as simple and easy to follow than the previous videos. I think if I had SPSS, it would be easier to understand.
Hi, I observed that in natural sciences some people perform Anova and Tukey tests with a very small sample sizes (7 to 15 per group) how to justify that? I’m a researcher in Management and social science and in my field, sample size should be at least 30 per group! Otherwise, small sample size violate the assumptions of using Anova (normality)! It’s rather T tests that should be used.. no?
what if you have 80 patients divided in 3 groups: 20 controll, 30 group1, 30 group2, which posthoc test should one use....does the lower control group affect the selecetion of post hoc test
Prof. at one place you have said that for equal no. of people we should use Tukey. I have unequal no. of people in my research, so which test to use? Thanks.
a lot of concepts to understand.
Hello Prof. Can i do one way Anova with individual Likert items (Measured on 5 point scale), which are part of a formative construct in my study? I am confused whether i can go with ANOVA, as Likert items are ordinal in nature. Request you to please clarify and provide an appropriate reference.. Regards, Karan
What is the difference between Tuky and Sidák? In terms of post hoc test
In this case, which is the statistical model?
Thank you!!!!!!
I have a question: I used one-way ANOVA to test one of my demographic which is marital status and the dependent variable is workplace bullying. I got one group (married-divorced) that have a sig difference after looking at post hoc but I dont know how to interpret it. should I say there is a significant difference between married and divorced people who are exposed to workplace bullying? then when I go back to the descriptive table to see the mean I only look for these two categories or all the groups?
Which post hoc test can be used if the groups are unequal?
Can two or more independent categorical and/or ordinal variables each having more than two labels (say 3 or 4....) be tested with one dependent scale variable by SPSS?
How to display the t statistics in the post-hoc test? I see that SPSS gives out 95% confidence intervals.... Any way I can get the t and p values?
i can't get my groups to populate on the list to drag it as a factor
Hi Dr Grande do you check data analysis and interpretation for students at a minimal fee?
hi. thank you for the video :)
may I know how to change the confidence interval when testing the anova? we can just change the sig level for post hoc in post hoc window... but what about the anova?
hi sir,
I was testing some financial data using Kruskal Wallis H Test. The test result says its significant but I am getting H statistic/ Chi sque value very very large compared with the others studies in the same field. Did i do something wrong, m i on right track. plz suggest me ???
Sir my data size is under the thirty and likert scale data one to five.i collect this data for four type of people how to analyse my data.i use anvoa or other??
I understood this video when watching it but after I felt a little confused. I think I am confused on what an ANVOA is analyzing.
Brittany Vodzak Agreed. SPSS seems more straightforward but maybe it's just because it is more aesthetically pleasing than Excel. I'm still trying to figure all of this out. Not comfortable with how to explain ANOVA... I can memorize these things but am having a hard time absorbing these concepts.
What test do I run if sample sizes between groups are not equal?
I have 20 ppts in 2 groups and 23 in one group, can i still use tukey?
Sir i ve a query
Suppose I am comparing scores of three independent groups say X Y Z on a particular variable.
Suppose before running ANOVA i want to check normality of my sample.
If i ve to check normality of scores in each group separately or all together??
Secondly, if i checked normality of each group separetly, and suppose i found that scores of one group is not normaly distributed but other two had or vice versa.. how shud I proceed in this case?
Hi Doc
Thank you for this video. I want your opinion if you could help me please. I have 10 variables and I need to check the interaction between them. each variable has around ten (x and y) points. I tried the scatter chart and best fit line but R is so low. that is why I need to find another way to check the interaction. do you have any suggestions ? thanks in advance
Is it neccessary to run a test of normality?