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RE: st: power calculation


From   htzavara@med.uoa.gr
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: power calculation
Date   Sun, 11 Sep 2005 17:23:59 +0300

&Agr;&rgr;&khgr;&igr;&kgr;&oacgr; &mgr;&eeacgr;&ngr;&ugr;&mgr;&agr; &agr;&pgr;&oacgr;  Raoul Reulen <raoulreulen@hotmail.com>:


I know the commands to perform the calculations of power. What i dont know is 
on which test am i going to perfom the analysis (Student's t-test or  Mann 
Whitney test etc). Is there any way to perfom a power analysis concidering all 
the statistical tests that are used or i am supposed to focus on the most 
interesting variable and calculate the power according to this?

thanks a lot!
> see
> 
> .sampsi
> 
> or use a excel spreadsheet like:
> 
> http://www.crcpress.com/e_products/downloads/webdownload/C415X/Sample%
20size.xls
> 
> Raoul
> 
> >From: htzavara@med.uoa.gr
> >Reply-To: statalist@hsphsun2.harvard.edu
> >To: statalist@hsphsun2.harvard.edu
> >Subject: st: power calculation
> >Date: Sun, 11 Sep 2005 14:01:29 +0300
> >
> >
> >--
> >helllo!
> >
> >i want to calculate the power of a case-control study. The test which
> >performed in this study was a Student's t-test, a Mann Whitney test, and 
> >three
> >chi-square tests. How will i perform the power analysis?
> >
> >thanks a lot in advanced!
> >
> >*
> >*   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/
> 


-- 


*
*   For searches and help try:
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