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this is so helpful, thank you very much

How can you treat Likert response item as number, it is a symbolic, right?

Perfect video and explanation - thank you so much Dr. Omar !

If you need private one to one tutoring session contact me to book a session and give you the cost per session

I am currently working on videos for assumptions for stat tests in the next 6 months to year will be many clips for assumptions for stat test one of them regression

Hi Check your data if it is suitable to do linear regression check your outcome or dependent variable if it is linear check assumptions

I have used three models for carbon estimation and i want to select best model among these three using multiple logistic regression for carbon storage in urban forest. I have dbh, height as independent variable and carbon data as dependent variable for each 136 tree species. Can i use this regression? Pls inform me. Thank you.

email me at mmomar982 @gmail.com

Do you provide statistical analysis services for PhD students?

Thank you 🙏🏼🙏🏼

Thank you Dr Omar! This was very helpful indeed.

This is helpful. Thank you.

Where can I get the log HR and SE data?

You are the best

T Score in Excel Sir Explne the Formula in Excel

How do you report this? What can be stated as the name of the post hoc test used?

Thank you so much Dr. 😊

hello Dr. greetings!! thanks for your nice and well-versed presentation. but i have one question, how to add meta-analysis package in spss?

Ordinal data is categorical/discrete. Does PCA work with discrete data? As far as I know discrete data is allowed only after one-hot-encoding. But you did not mention one-hot-encoding.

I have benefited a lot from your informative presentation, You have such amazing way to simplify the information to be ready in a perfect way.

Thank you so much Dr. This detailed explanation is so helpful for a beginner.

Thank you. Excellent presentation. Logical and clear step by step. Very helpful

Thank you. Excellent presentation. Logical and clearly explained. Very helpful.

Thank you sir

Thank you for such an informative and clear video. I have two questions: firstly, by adding the data of a study when we have two different time points, should we enter the post-test measurement data? I mean, don't we need to enter the baseline measurement data? and secondly, what if one study among all, has three time point measurements? How the comparison can be made in this case?

This was very helpful for my research ❤

This is just awesome, useful and comprehensive tutorial. You deserve the best!

Excellent Sir G.

Very understandable. Thank you Sir 😊

Thank you very much for the tutorial Dr Omar.

1. 2:16 Subgroup analysis can only be performed for dichotomous outcomes 2. 13:38 code for subgroup meta-analysis 3. 18:23 generating Forrest plot, 21:50 Forrest plots with study IDs

How would I calculate the SD values if the studies of my systematic review don't tell me the SD, they only show the Mean values. Thank you very much for the video!

Thank you, Dr. Omar, for the detailed explanation. What if we have 2 or 3 different time point measurements. How should we arrange the data in SPSS?

What happened if we have just 2 categories then what will be the reference category??😊

Fantastic video. Very helpful!

Thank you so much sir for detailed explanation!

It is a very useful video.

Thanks so much

Can We use the same procedures for polytomous items?

Hello. Thank you for this explamation. Is there a way to assign the classic letters (e.g., A, AB, B, C) to differentiate the groups after the post hoc? It would be very useful...

thank u so much sir!!

Thank you Dr Omar for this very informative video and explanation. Much appreciated!

aren't dummies binary?

The video is too long, and I suggest breaking it down and make it simpler to avoid this confusion.

Many thanks Dr. Omar for your straightforward discussion. I really enjoyed your tutorial and benefited a lot despite being professor doing stat for years,

Good morning doctor Mahmoud Please, can you make a video on: How to read, interpret and write the results (output tables) of non-linear regression in SPSS? Thank you Best wishes Doctor Sameer

Dr. Omar, you're a father figure to me. You made it so easy that even my 6 year old nephew is now running meta-analysis. Thank you so much. You deserve the best

Dear sir, For determining the effect size, can the correlation coefficient be from a previous interim analysis which is done for the same variables? Is the squared multiple correlation (rho squared) the same rho which is obtained by the correlation analysis? Thank you.

Thank you so much sir

Good lesion, but could you add test of overall/pooled/common effect size to determine if the common effect size if stat sign or not.