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| From | Nahla Betelmal <nahlaib@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: test of coefficients of the same regression equation |
| Date | Fri, 15 Feb 2013 11:37:09 +0000 |
Great, many thanks Florian Kindest regards Nahla On 15 February 2013 10:59, Florian Wendelspiess Chávez Juárez <florian@chavezjuarez.com> wrote: > Dear Nahla > > No, to test the mean you would use the command ttest. In this case you are > using test, hence you are testing linear hypothesis. Check the help files of > the two commands and you will see the difference. > > Best regards, > Florian > > > > On 15-Feb-13 11:49, Nahla Betelmal wrote: >> >> hi Florian, >> >> Thanks for the reply. Would not that test the difference of the mean >> between the two variables rather than testing the difference between >> coefficients themselves? >> >> Thanks again >> >> Nahla >> >> On 15 February 2013 10:42, Florian Wendelspiess Chávez Juárez >> <florian@chavezjuarez.com> wrote: >>> >>> Hi Nahla >>> >>> I think you can simply use: >>> test [mean]NSP = [mean]Times_2 >>> >>> or even >>> >>> test NSP = Times_2 >>> in this case, since there is only one equation as I see. >>> >>> I hope this help. >>> Best regards, >>> Florian >>> >>> >>> >>> On 15-Feb-13 11:29, Nahla Betelmal wrote: >>>> >>>> Dear Statalist, >>>> >>>> I am trying to test the equality of coefficients b1 and b3 of the same >>>> regression equation >>>> >>>> reg Y NSP Q Times_2 >>>> >>>> est store alltwo >>>> >>>> suest alltwo >>>> >>>> test [alltwo_mean]NSP = [alltwo_mean]times_2 >>>> >>>> I got the error message : equation [alltwo_mean] not found >>>> r(303); >>>> >>>> All goes well till the test part. However, I had no problem using the >>>> same steps when I wanted to test the coefficients equality between >>>> two different regression. equations. >>>> >>>> It would be great if you let me know what I am doing wrong and the >>>> right way to test the coefficents of the same regression equation. >>>> >>>> Many thanks >>>> >>>> >>>> Nahla >>>> * >>>> * 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/ >>> >>> >>> * >>> * 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/ >> >> * >> * 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/ > > > * > * 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/ * * 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/