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.

Thanks, please continue uploading. We are watching and appreciating your efforts 🫡 (from Indonesia)

Does it also works for two way ANOVA?

Hello Sir, can you please make a video on 2 way ANOVA on parametric data having multivariate like 3×4 independent variable and 6 dependant variables like, body weight heighg, length, kideny weight, liver weight..

Very useful and beneficial presentation. If a question has many choices which have to be ranked inorder of preference, in the variable view what do we assign for the type and measure of that question?

Thank you so much

Thank You

Hello Dr. M. Omar. I need to contact with you . Can you send your Email or Whatsapp? and Thank you.

Thanks, please continue uploading. We are watching and appreciating your efforts 🫡🙏

شرح ممتاز ووافي بارك الله فيك

Dr. Mahmoud, I followed your video. I have 2 independent variables (include the concentration and pretreatment) and 1 dependent variable (scores) However, when using the non parametric test in the SPSS software, I cannot select the concentration and pretreatment into the grouping variables, I can only choose the scores into the testing variable. I have tried many times but still does not work, What can I do for this situation? Tank you very much!!!

Poor teaching methodologies

Excellent SPSS presentation and very useful data-cleaning process.

Your videos are very helpful sir...i have one doubt sir....how to incorporate 3x2x2 factorial RBD and 5 checks(controls) in one tabel sir...can it possible sir...please reply sir

Thank you for this video Doctor. I would like to ask how to add extra decimal place (e.g to make it 3 dp) for the values of the ES and CI?

Hello teacher, thank you for the information. However, according to the example data entry will favor the experimental group ins't? But why in the forest plot it favors the control group? I have the same problem with my research. Thanks!

👍

My skewness variabel Y is negative but can be normal with LOG10(x) is it allowed? Or must be outlier?

Sir could you please explain how to do absolute principle component score - multiple linear regression (APCS MLR) modelling in SPSS.

Thanks so much for the video, but I have a question and is how do we perform the Egger's test?

The relationship between X and Y is assumed to be linear so the Xi^2 is not linear ma'am

Thank you for explaining the result. I need to know..if I have multiple predictor should i include them all at time, like we do for binary logistic model fitting.. Or it's just one predictor at a time? How to model fit here with multiple predictor

Thank you so much. I have a question. As per the formula for I2 that you mentioned at the beginning of the video, if we insert the values of Q and df from the example at the end of the video, the I2 comes out as 18% or 0.18. However, in the example, it says I2=0.23. Can you pls explain?

Really useful, thank you Dr

exactly what i need thanks..

Highly recommend and more didacticial. Thanks Dear Professor

Good Teacher Dr. M. Omar