Friday, March 03, 2006

Re: st: significant kwallis results

ricardo, a user-written program, -kwallis2-, may get you where you want to go... --clint

> > Dear all, > > I use the nonparametric -kwallis- test and obtain > these significant results: > > . kwallis outcome ,by(group) > > Test: Equality of populations (Kruskal-Wallis test) > > +---------------------------+ > | group | Obs | Rank Sum | > |----------+-----+----------| > | Placebo | 12 | 278.00 | > | Drug 1 | 12 | 265.00 | > | Drug 2 | 12 | 170.00 | > | Drug 3 | 12 | 107.00 | > +---------------------------+ > > chi-squared = 14.457 with 3 d.f. > probability = 0.0023 > > chi-squared with ties = 14.457 with 3 d.f. > probability = 0.0023 > > > Is there a way to test which drug groups differ while > maintaining the correct type I errror? Maybe, > something similar to Duncan's test after Anova, or > multiple adjustment method. > > Thank you, > Ricardo. > > Ricardo Ovaldia, MS > Statistician > Oklahoma City, OK > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > * > * 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/ >

* * 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/


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