I have run a multigroup conditions and covariate analysis on smokers. I
have two treatment groups, medication and group therapy, and I am using
age and gender as covariates. I have used interaction with subject. Is
this correct? I also chose no centering. Is htis correct? I have also
run the same analysis with no covariates so I am basically looking to
compare the two to see if age and gender play a role.
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