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RE: st: Re: Non parametric anova


From   "Lachenbruch, Peter" <Peter.Lachenbruch@oregonstate.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Re: Non parametric anova
Date   Tue, 30 Aug 2011 16:53:18 -0700

Alternatively, you can replace the values with ranks and use anova

________________________________________
From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox [njcoxstata@gmail.com]
Sent: Tuesday, August 30, 2011 8:45 AM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Re: Non parametric anova

It's hard to see that Friedman can be appropriate but not -ologit-.

I'd use an analysis based on means and wave a flag of caution.

Nick

On Tue, Aug 30, 2011 at 4:39 PM, Arti Rayit <arti.rayit@yahoo.com> wrote:
> I have any experiment which involves measuring pain scores on patients in the
> range 0(1)4 at 4 time periods with 2 drug therapies and I am stuck with the
> analysis. I considered ologit but I do not think that it is appropriate for
> repeated measures and I could find nothing in the 'xt' suite of programs. For
> each treatment Friedman (SJ-5-2) shows an effect of time but does not allow me
> to compare the treatments.
>
> I would be grateful for any advice. I am using Stata 12.
>
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