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| From | "Kerry MacQuarrie" <kerry10@u.washington.edu> |
| To | <statalist@hsphsun2.harvard.edu> |
| Subject | st: Troubleshooting comparison of means across groups |
| Date | Thu, 28 Jun 2012 10:12:47 -0400 |
Hi all, I am trying to run t tests to compare means of some (continuous) variables across groups. However, I'm running in to some puzzling error messages. If I run the code ttest varname by(groupvar), I get: "factor variables and time-series operators not allowed". Any ideas on where to start looking to troubleshoot this? Thanks for any suggestions. Kerry ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Kerry MacQuarrie NSF Fellow and CSDE Trainee Sociology Department University of Washington * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/