Hello, I am trying to run an ANOVA with three groups and want to covary for age. I understand that if no qVars option is given, the default is to center age across the whole sample, however I want to center age within each group. I know the help document says to do this myself and then put it in the datatable, but my question is will the command then try to center it again since there is no option to "turn off" centering or will it recognize that the variables are centered. Thanks!
Amanda