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| From | "JVerkuilen (Gmail)" <jvverkuilen@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: non-normal residuals |
| Date | Tue, 12 Feb 2013 11:01:38 -0500 |
On Tue, Feb 12, 2013 at 10:36 AM, Xixi Lin <winnielxx@gmail.com> wrote: > Hi JVerkuilen, > > Thanks for your help. I have a question about the skewness. How to > tell the skewness from the qnorm plot? Or is there any test that I can > test the skewness of the residuals? The -qnorm- plot should have all your points fall mostly on a line. If you have skew it'll pull away from the line near one extreme or the other. This should be in any good regression textbook. Use a density plot, boxplot, or a histogram as well. All are useful. None are definitive. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/