--- Woong Tae Chung wrote:
> I am trying to compare the differences in means on a dummy variable
> between participant and comparison group. In the case of continuous
> variable, it can be performed by "ttest var, by(group)" but it
> works for dummy variable, too?
The mean of a dummy variable is a proportion. -prtest- is a better
way of doing such a test, see: -help prtest-
Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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