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| From | "Lachenbruch, Peter" <Peter.Lachenbruch@oregonstate.edu> |
| To | "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> |
| Subject | st: RE: probit model sample size |
| Date | Fri, 2 Jul 2010 14:30:46 -0700 |
You generally need about 8 to 10 times as many observations as you have variables. You may be overfitting your data. Proceed with caution. Tony Peter A. Lachenbruch Department of Public Health Oregon State University Corvallis, OR 97330 Phone: 541-737-3832 FAX: 541-737-4001 -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of dk Sent: Friday, July 02, 2010 1:53 PM To: statalist@hsphsun2.harvard.edu Subject: st: probit model sample size I want to know about the sample size for the probit model. If i have a sample size of 300 and using 20 explanatory variables, after running the model, I have carried various goodness-of-fit test. and the result shows that our model fit the data. should I use the probit model or not. Thanks in advance. * * 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/ * * 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/