May you please help me understand how I could get cov(1,2) for difference between 2 groups in proc mixed? I looked at the book "SAS for Mixed Models, 2nd Edition, by R. Littell et al. (SAS Press)" but still I do not find the answer.
In diffs output, only estimate and stderr included, but not covariance.
I think using the COVB option in the MODEL will give you what you want.
SteveDenham
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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.