title: Substance abuse and academic performance
data: file=c:\documents and settings\jvevea\desktop\4-16-2009\class2.txt;
variable: names=sex hsgpa colgpa drink drugs;
          categorical = drink drugs;
          grouping = sex (0=Male 1=Female);

model: 
       perform by hsgpa colgpa;
       abuse by drink drugs;
       perform on abuse;