R: Normality Assumption Linear Mixed Effects Model (Multilevel Model)

[@Questtoknowwithdraftab]

You doing great job for researcher

[@Mara2892]

Great video, thanks! What about homoscedasticity test?

[@RegorzStatistik]

I think you could use the extracted residuals as well for a homoscedasticity test (scatterplot predicted values and residuals, as in normal regression). However, for level 2 it is not trivial to get the predicted values.