Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: Comparing results from two separate t-tests


From   Geoff Wallace <gw46@cornell.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Comparing results from two separate t-tests
Date   Wed, 12 Mar 2008 15:30:45 -0400

Dear All,

I have had problems trying to test for whether the treatment effects for two groups of respondents (conservatives and liberals) in a social science experimental questionnaire I am using are significantly different. I used the -ttest- command to obtain the difference of means across the treatment and control group first for the conservative respondent subsample and then repeated the procedure for the liberal respondent subsample. I should also note that I used the –unpaired- option for each command since the data are not paired. The output from the two -ttest- commands yields a separate treatment effect for each subsample. However, I am having trouble figuring out how to use Stata to perform a corresponding ttest on the two separate difference of means. I tried using -est store- after each -ttest- command, but as I expected this option does not appear to work with –ttest-.

Any help would be much appreciated.

Best, Geoff

--
Geoffrey P.R. Wallace
Ph.D. Candidate
Department of Government
Cornell University

214 White Hall
Ithaca, NY 14850
t.202.302.4209
f.607.255.4530

*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/




© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index