Your videos are not meant for students only, but also for all those teachers who do not know how to teach effectively. I feel so glad that I found your channel. You are so talented.
Amazing, I am speechelss. Every single word of the lesson is the right word to explain the concept. This is Education, with capital letter. The world is a better place thanks to your videos.
"I love to learn and help others learn. That is my life. It is what brings me joy, happiness, and meaning." (Brandon Foltz) Thanks a lot. you're so great :) I was crazy for waking up at 7 AM for going to statistical class! I just need to see your videos at 7 PM ... ! :)
I so appreciate these videos. I'm taking an online stats course and since it's been a long time since I've been a student, it's been quite an adjustment. I watch them before I tackle each section of the written material for my course so that it is somewhat familiar and less overwhelming. So thank you for that.I have to say though, as a Canadian, the meter stick cracked me up! If someone sent me a meter stick with 100mm I would send it back since it's 10x too short. To be fair, I have no idea how many inches are in a yard stick ;) Thanks again for these wonderful videos and also for the little pep-talk. They really do help!
Well, I only need this now so you're probably not even reading comment anymore. But still want you to know that for some, like me, this is life-saving. I have a project to do and my teacher doesn't know how to teach but I found your videos and I'm learning as much as I can from you. You really do an amazing job! Thank you!
Hi Mei Yuan! One of the strange things about the chi-square distribution is that the probability runs in "reverse." Zero is on the right, going up to one on the left. The cumulative probability runs right to left, not left to right.
Hi Brandon, hello from Coimbatore, India. At the outset I really thank you for such a wonderful work. You're a born teacher!!!!! I'm part of a big higher education college system in tamilnadu and I have made it mandatory for our new stat profs and students to undergo your lectures and they are loving it. Just a small correction in this video. There seems to be a multiplication error in sample variance.
Khan Accademy also have lot of animated practice questions and answers helping you to eventually be very proficient. I would strongly suggest Brandon to launch practice questions with these videos and also make slides available to download for repetition. It is just not practical to view the whole video again and again for revision. Perhaps launch this course with notes and questions on Udemy.
Hey its awesome that you are helping so many student by the videos but if could provide us with the power point presentations it would be easier and quicker for us to read it or go through it once again after watching the videos. If you can do something about it that would be great.
Great video. Your comment on the 441 variance at 14:58 is probably the most important thing in these videos and for data analysts in general. Knowing what numbers you can use in your tests is the essence of Statistics.
Hi Brandon amazing videos again however I have one question @ 12.21 we went with the upper/right tailed test. Is there a reason we aren't going with 2 tailed test?
I have so many issues with Randomized Block Designs. I don't see anyone doing videos breaking it down for me step by step, like you do. Do you think you could do two more videos with the RBDs and maybe one with the Bonferroni Method? Both of those confuse me to no end, and my poor sweet teacher just doesn't speak my language.
Not sure if you're still reading comments... I have a question, why is it that in the confidence interval the interval uses less than or equal , more than or equal symbols whereas here it is strictly less than or more than chi squared value?
Some books do it differently I have noticed. However I believe having the equal sign is correct because the test statistic could fall exactly at the critical point.
in the high interest realty example i just want to check whether the rounding matters since the data is in days because the sample variance is 582 then the standard deviation becomes 24 days which is not the precise square root of 582, did you do this because of rounding for ease of calculation ?
The 2nd example seems like a situation where we would use the F distribution.. ( I just finished watching that video). Is the difference that we have an implied infinite number of samples from which we determined the old machine variance? Thank you for the videos.
Hi Brendon! I was wondering if we were to ask ourselves which confidence level is a stricter one between 99% and 95 %, what would be the answer and why? Is it 95% (or lower) since it considers values nearer to the mean?
Hi Brandon! My doubt is that if I decrease population standard deviation, chi-square will increase and after certain value it will fall under rejection region. Shouldn't it be Left Tailed Test ?
Variance tests are the Sherlock Holmes of statistics. They investigate if your data's behavior is as 'elementary' as you think or if it's throwing a 'variety' show!"
Hi, thank you very much for these lectures. They are very good. Just one question: In the machine tool example, should the variance not be in square microns rather than microns?
Hi Brandon. Great video. I have one question which raised some confusion for me. In the Micro machines example you gave the Variance S^2 units of microns (s^2 = 100 microns, vs s^2 = 162 microns). In your other examples you used the 's' or standard deviation as a value that is in relation to units since s^2 is a square. Did you intend to do it that way, and if so under which conditions would you use actual units with s^2 as opposed to s? Thank you for your videos, they're a great help in my grasping these concepts in statistics.
Your videos are the best. just a little too slow for me, so i have to forward it n sometimes i miss a concept doing that. but otherwise i like the videoes
Your videos are not meant for students only, but also for all those teachers who do not know how to teach effectively. I feel so glad that I found your channel. You are so talented.
Amazing, I am speechelss. Every single word of the lesson is the right word to explain the concept. This is Education, with capital letter. The world is a better place thanks to your videos.
After so many years since publishing, you are still effective in your lessons.
"I love to learn and help others learn. That is my life. It is what brings me joy, happiness, and meaning." (Brandon Foltz)
Thanks a lot.
you're so great :)
I was crazy for waking up at 7 AM for going to statistical class!
I just need to see your videos at 7 PM ... ! :)
I so appreciate these videos. I'm taking an online stats course and since it's been a long time since I've been a student, it's been quite an adjustment. I watch them before I tackle each section of the written material for my course so that it is somewhat familiar and less overwhelming. So thank you for that.I have to say though, as a Canadian, the meter stick cracked me up! If someone sent me a meter stick with 100mm I would send it back since it's 10x too short. To be fair, I have no idea how many inches are in a yard stick ;) Thanks again for these wonderful videos and also for the little pep-talk. They really do help!
Well, I only need this now so you're probably not even reading comment anymore. But still want you to know that for some, like me, this is life-saving. I have a project to do and my teacher doesn't know how to teach but I found your videos and I'm learning as much as I can from you. You really do an amazing job! Thank you!
+DarkAng3lyka1 Yes i read them! And thank you for the comment. 😍 Keep digging.. you can do it
Hi Mei Yuan! One of the strange things about the chi-square distribution is that the probability runs in "reverse." Zero is on the right, going up to one on the left. The cumulative probability runs right to left, not left to right.
Hi Brandon, hello from Coimbatore, India. At the outset I really thank you for such a wonderful work. You're a born teacher!!!!! I'm part of a big higher education college system in tamilnadu and I have made it mandatory for our new stat profs and students to undergo your lectures and they are loving it. Just a small correction in this video. There seems to be a multiplication error in sample variance.
Brandon, thank you man for these awesome videos. Could you do something on time series (specially on ARIMA)?
sir really enjoying the videos like a movie
These videos are really great, and as much as I like Khan Academy, way better than his statistics videos as well!
Khan Accademy also have lot of animated practice questions and answers helping you to eventually be very proficient. I would strongly suggest Brandon to launch practice questions with these videos and also make slides available to download for repetition. It is just not practical to view the whole video again and again for revision. Perhaps launch this course with notes and questions on Udemy.
THANK YOU SO MUCH THIS HAS SAVED MY LIFE
thanks for such an educative work
Great stuff, thank you for the informative videos Brandon!
thanks for your time and effort.
Hey its awesome that you are helping so many student by the videos but if could provide us with the power point presentations it would be easier and quicker for us to read it or go through it once again after watching the videos. If you can do something about it that would be great.
Great video.
Your comment on the 441 variance at 14:58 is probably the most important thing in these videos and for data analysts in general.
Knowing what numbers you can use in your tests is the essence of Statistics.
Awesome video. Cheers!
Awesome, truly awesome !!
Hi Brandon amazing videos again however I have one question @ 12.21 we went with the upper/right tailed test. Is there a reason we aren't going with 2 tailed test?
I have so many issues with Randomized Block Designs. I don't see anyone doing videos breaking it down for me step by step, like you do.
Do you think you could do two more videos with the RBDs and maybe one with the Bonferroni Method? Both of those confuse me to no end, and my poor sweet teacher just doesn't speak my language.
Not sure if you're still reading comments... I have a question, why is it that in the confidence interval the interval uses less than or equal , more than or equal symbols whereas here it is strictly less than or more than chi squared value?
Some books do it differently I have noticed. However I believe having the equal sign is correct because the test statistic could fall exactly at the critical point.
in the high interest realty example i just want to check whether the rounding matters since the data is in days because the sample variance is 582 then the standard deviation becomes 24 days which is not the precise square root of 582, did you do this because of rounding for ease of calculation ?
I have the same doubt
Sir please , which table to use here to find the critical value T tables or Z tables ?
What to use when in clinical data? Can you give an example to clarify it? which condition/relations should require variance/mean testing?
@14:40, shouldn't the denominator be the population variance, which in this case, is unknown? 441 is the expected (or hypothesized ?) variance?
The 2nd example seems like a situation where we would use the F distribution.. ( I just finished watching that video). Is the difference that we have an implied infinite number of samples from which we determined the old machine variance?
Thank you for the videos.
Hello, there is a slight mistake in the last few slides, you have considered one meter equal to 100 mm rather than 1000 mm.
Hi Brandon, isn't there 1000mm in a meter stick?
+Eric Corriveau Bad! Crisis meeting.
Great video. Excellent teaching. However, a meter stick should be 1000 mm.
Hi Brendon! I was wondering if we were to ask ourselves which confidence level is a stricter one between 99% and 95 %, what would be the answer and why?
Is it 95% (or lower) since it considers values nearer to the mean?
I love your videos. There are 1000mm in a meter.
Hi Brandon! My doubt is that if I decrease population standard deviation, chi-square will increase and after certain value it will fall under rejection region. Shouldn't it be Left Tailed Test ?
Variance tests are the Sherlock Holmes of statistics. They investigate if your data's behavior is as 'elementary' as you think or if it's throwing a 'variety' show!"
Hi, thank you very much for these lectures. They are very good. Just one question: In the machine tool example, should the variance not be in square microns rather than microns?
Stuart Penning Also, a meter has 1000 mm. I hope these comments add some value to your great efforts.
Hi Brandon. Great video. I have one question which raised some confusion for me. In the Micro machines example you gave the Variance S^2 units of microns (s^2 = 100 microns, vs s^2 = 162 microns). In your other examples you used the 's' or standard deviation as a value that is in relation to units since s^2 is a square.
Did you intend to do it that way, and if so under which conditions would you use actual units with s^2 as opposed to s?
Thank you for your videos, they're a great help in my grasping these concepts in statistics.
Amazing.
why the s2 has a unit of microns?
Your videos are the best. just a little too slow for me, so i have to forward it n sometimes i miss a concept doing that. but otherwise i like the videoes
+Ayush Agarwal just increase the speed to 1.25 or 1.5, that will help.
how dumb are you?
Minitab examples, please
Just a picky technical matter. At ~18:50, th equality of the video changes significantly. Has that always happened.?
Seems OK on my end but thanks for letting me know just in case!
Why is the upper right region? It should be lower left region.
Thank you so much! Your words of encouragement are just what I needed!