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st: ttest or xtmelogit?


From   tiago.pereira@incor.usp.br
To   statalist@hsphsun2.harvard.edu
Subject   st: ttest or xtmelogit?
Date   Mon, 10 Mar 2008 18:30:28 -0300 (BRT)

modelling error structure with a pilot study in pharmacology sounds funny,
specially with 6 mice in each group, Nick. Math and statistics sometimes
blind researchers.

I would not try to answer anything with a pilot study (in
pharmacology/biochemistry, etc..).

Pilots are done to see the direction of the effect. If it shows a signal,
we keep going. If not, we stop and try other alternatives. Mann-whitney
sounds ok, at least in my modest view.



Tiago






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