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st: Comparing two ratios


From   Ashwin Ananthakrishnan <ashwinna@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Comparing two ratios
Date   Fri, 5 Aug 2005 09:11:29 -0700 (PDT)

Hi,

I a quick statistical question in stata. I have three
variables - var1, var2, and var1/var2 (ratio between
var1 and var2). If I need to compare the mean
var1/var2 ratio between two (or more) groups - do I
just use the t-test in stata or do I need to perform a
different kind of analysis? 
Do I need to check the distribution of var1/var2 to
see if it's normal, and if not, maybe log transform?
Thanks,
Ashwin


		
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