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Re: st: sampsize formula
From
Richard Goldstein <[email protected]>
To
[email protected]
Subject
Re: st: sampsize formula
Date
Thu, 03 Nov 2011 15:34:20 -0400
the formulae are given in the manual in the "methods and formulas"
section -- starts on p. 1923 of the reference manual (v. 12)
Rich
On 11/3/11 3:11 PM, Sara Borelli wrote:
>
> Hello Statalist members,
>
> I would like to know the exact formula beyond the sampsi command to calculate the sample size of two groups using comparison of means :
>
> sampsi m1 m2, sd1() sd2() power () alpha()
>
> the output gives me the sample size of the two groups, n1 and n2, but I would need the exact mathematical formula
>
> Thanks for any suggestion
> Sara Borelli
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