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Re: st: -metan- doesn't seem to do the Welch F-test

From   Nick Cox <>
Subject   Re: st: -metan- doesn't seem to do the Welch F-test
Date   Mon, 11 Apr 2011 12:29:34 +0100

I don't know, but I have a minor emendation.

Roger is in meta mode and probably thinking "Cochrane collaboration".

This author was W.G. Cochran.


On Mon, Apr 11, 2011 at 12:24 PM, Roger Newson <> wrote:
> I have a query re the -metan- command. When meta-analysing statistics from
> continuous data (eg arithmetic mean differences and geometric mean ratios),
> it seems to be using a chi-squared heterogeneity test, instead of the Welch
> heterogeneity F-test, which was recommended in the seminal paper by Cochrane
> (1954) for the case of continuous data. Is there a reason for this?
> Best wishes (and thanks in advance)
> Roger
> Reference
> Cochrane, W. G.  1954.  The combination of estimates from different
> experiments.  Biometrics 10(1): 101-129.

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