Two factor ANOVA with repeated measures

[@xmasEsther]

fantastic!!!! my mind is much clearer after watching this. Thank you!!

[@datatab]

Calculate the example directly with DATAtab for free, just click the link: datatab.net/statistics-calculator/hypothesis-test/anova?example=two_factorial_anova_with_repeated_measures

[@Exceljournals]

Thank you so much for this! Super clear and straight to the point!

[@JosefineSkyllberg]

Hi, great video! Could this analysis (Two factor ANOVA with repeated measures) be applied in a scenario when you have sampled two treatment areas (impact and control) over two sampling times (before and after) in the same sampling area (in my case a shallow bay)? In other words, does the observations become dependent of each other when sampled in the same bay (e.g. with the same environmental abiotic factors)?

[@chacmool2581]

This is a good video, but it only takes you up to the overall model. The real insights are in the Contrasts, in the post-Hoc Analysis.

[@datatab]

Hi many thanks for your feedback! I will put it on my to do list and maybe add this information!

[@matthewbeeler3354]

Can you clarify something for me? The summary in words shows no difference for your time variable but the data shows otherwise and you state otherwise. Can you explain what is going on there? Your data shows that there is an overall effect for your time point (before, middle, and end) and the p value is smaller than 0.05. However, in the summary in words, they don't talk about it and lead you to believe there is no difference for time.

[@evazhong4419]

Hi, how to perform three factor ANOVA with repeated measures in the datatab?

[@datatab]

Hi, unfortunately, this is not possible yet! Sorry, Regards, Hannah

[@Puregold24karat]

Hello can anyone confirm whetherr the participants in each group are different? Or each participant in the research would undergo all therapy (A, B, C) but measured at different times?

[@diananazaryan]

Could you make video on ANCOVA, please?

[@datatab]

Thanks, I will put it on our to do list! Thanks!

[@sovannaramoun2152]

Could you explain us about how to analyze Difference-in-Difference? Thank you in advance.

[@scramah195]

When you are describing the assumptions for the ANOVA tests, you make the following comments: "The variances in each group should be about the same" and "The data within the groups should be normally distributed". I am slightly confused by this wording. Shouldn't the assumptions, *instead* , read as: 1. The variances of the *populations* from which each group is drawn from should be the same 2. The *population* from which each group is drawn from should have a normal distribution

[@datatab]

Yes that's right of course! You have formulated it even more precisely. But since you don't have the population, you use the data from the sample and then you can of course check the two points only with the sample data.

[@scramah195]

@@datatab thank you~