You should also find on the web : paper Using SAS Proc Mixed to Fit Multilevel Models, Hierarchical Models, and Individual Growth Models by Judith Singer (Harvard edu).
Good luck,
Koen
Catch up on SAS Innovate 2026
Dive into keynotes, announcements and breakthroughs on demand.
ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.