Re: st: tukey/dunnett procedures

[Roger Newson <r.newson@imperial.ac.uk>]

Equation (9) of Dunnett (1955) is a generalization to the t-distribution 
of the inequality demonstrated for the Normal distribution by Sidak (1967).

Best wishes

Roger


References

Dunnett C. W. 1955. A Multiple Comparison Procedure for Comparing 
Several Treatments with a Control. Journal of the American Statistical 
Association 50(272), 1096-1121.

Sidak, Z. 1967. Rectangular confidence regions for the means of 
multivariate normal distributions. Journal of the American Statistical 
Association 62: 626-633.


Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
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Tel: +44 (0)20 7352 8121 ext 3381
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Email: r.newson@imperial.ac.uk
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Opinions expressed are those of the author, not of the institution.

On 14/06/2011 23:29, Airey, David C wrote:
> .
>
> Is that right? How does this work out?
>
> > I think you'll find that the Dunnett multiple-test procedure is really the Sidak multiple-test procedure. This is available using the -smileplot- package, downloadable from SSC. And the corresponding frequentist q-values are available from the -qqvalue- package, also downloadable from SSC.
> >
> > Roger Newson.
>
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