st: Tabulate

[Claude Francoeur <claude.francoeur@hec.ca>]

Hello,

I want to compare the frequency of a dichotomic variable (POSAR) for 
subgroups. The group variable is called GROUP and contains 4 subgroups.

What would be the right command to compare POSAR for two subgroups, say 
group1 and group2 and perform a chi2 test of the difference of frequencies?

Thanks for your help,

Claude 

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