Please note Student-Newman-Keuls is NOT a recommended multiple comparison procedure.

In the language of Hsu (1996), Student-Newman-Keuls is not even a "confident 
inequalities" method. In other words, it does not control the probability of making at 
least one incorrect assertion of inequality (which is the least you should expect of 
any multiple comparisons procedure). 

Tukey's HSD does protect the desired error rate, and gives you confidence intervals as 
well (not just assertions of inequality). 

Reference:

Hsu (1996). Multiple Comparisons, Theory and Methods. Chapman Hall.

Jörg Peter Baresel wrote:
>  How can I perform a Student-Newman-Keuls-Test for multiple 
> comparision of means in R? (I did not manage to find any specific 
> function in the libraries)
> 
> 
> Jörg Peter Baresel
> Technische Universität München
> Institut für Ackerbau und INformatik im Pflanzenbau
> D-85354 Freising
> Lange Point 51
> 

James A. Rogers, Ph.D. <[EMAIL PROTECTED]>
Statistical Scientist
Cantata Pharmaceuticals
300 Technology Square, 5th floor
Cambridge, MA  02139
617.225.9009 x312
Fax 617.225.9010

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