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st: sampsi and percentages


From   Ricardo Ovaldia <ovaldia@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: sampsi and percentages
Date   Mon, 29 Aug 2011 11:40:33 -0700 (PDT)

 
 
I need to compute sample size and power for a study comparing two group on a measurement bounded by (0,1), (a measure of intensity).
I was thinking about using -sampsi- to power on the difference of means. However, this seems strange to me, is there another way to power such comparison?
 
Thank you,
Ricardo

Ricardo Ovaldia, MS
Statistician 
Oklahoma City, OK

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