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Re: st: RE: Statistical test comparing two nonindependent variances?


From   "Austin Nichols" <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Statistical test comparing two nonindependent variances?
Date   Fri, 14 Apr 2006 13:26:11 -0400

The RE: in the subject line seems to suggest this a reply to
something, but it's not clear what...
maybe this Q was already answered, but here goes, anyway...

. help sdtest

and -findit compare variance- would find that and sbe33
    (commands implementing the Bland-Altman approach to comparing
        two or more measurement methods;  also alternative command to
        sdtest based on Pitman's method giving confidence intervals
        for variance ratios of paired data)

On 4/14/06, Anderson, Bradley J <BAnderson1@lifespan.org> wrote:
> A colleague wants to test the hypothesis that the variance of X1 is not
> equal to the variance of X2.  X1 and X2 are measured on the same scale of
> measurement in the same sample.  I know of the F-test for comparing two
> variances from independent samples, but can't seem to come up with anything
> that is appropriate in this case.  Perhaps I'm just ignorant.  Thanks!
>
> Brad Anderson

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