Re: st: Finite population correction when testing equality of two proportions

[Richard Williams <Richard.A.Williams.5@nd.edu>]

At 09:41 PM 4/1/2005 +0200, Fredrik Nyberg wrote:
> Hi all Statalisters
>
> I am wondering about testing two proportions in the following setting:
> Infinite overall population size (for all practical purposes)
> Sample 1 taken from overall population
> Sample 2 subsampled from sample 1
>
> Since these are not two independent samples from the same overall 
> population, I think I need to adjust the test by making a finite 
> population correction somehow for sampling sample 2 from sample 1. Only I 
> can't find any details on this nor a test that appears suitable in Stata.
>
> Can anyone help?
> What is the correct test?
> Is there Stata-code available?
My initial inclination is to go to sample 1 and code each case as 1 if not 
in sample 2, 2 if in sample 2.  Then, use the -prtest- command to compare 
the 2 groups.  But, my initial inclinations have been wrong before.  The 
-prtest- command is discussed on the last page of this handout:

http://www.nd.edu/~rwilliam/xsoc592/lectures/TwoSample-Stata.pdf

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