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Re: st: Samspi non normality?


From   Jeph Herrin <junk@spandrel.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Samspi non normality?
Date   Fri, 10 Nov 2006 12:33:17 -0500

Depends on what assumptions (if any) you want to make and what
test you want to use.



Di Stefano, Paola wrote:
Dear all,

I'm trying to estimate a sample size for two-sample comparison of means
using the command sampsi.
The study is to test for a difference in effectiveness of 0.5 between
two groups, assuming a sd(1.4)
Is there any way to change the normality assumption? Is there another
way to estimate sample size?
Thanks
Paola






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