On 14 Mar 2005 at 16:13, Peter Dalgaard wrote: > Alice Le Bars <[EMAIL PROTECTED]> writes: > > > Dear all, > > > > I would be glad if someone could tell me if Tukey HSD (function of > > stats library) accept the NA values and could correct the unbalanced > > design (different number of sample in each group) > > I don't think the *theory* of the HSD allows this. There is some more > or less well-founded speculation that if the imbalance is not too bad, > then the HSD results are somewhat useful anyway, but please consider > using the multcomp package, which is specifically designed to get > these things right. >
I believe that Hayter (JASA, 1984, 12, 61--75) proves that the so-called Tukey-Kramer method is guarnateed to be conservative for any set of cell sizes --- under the usual ANOVA model, of course. ---JRG > -- > O__ ---- Peter Dalgaard Blegdamsvej 3 > c/ /'_ --- Dept. of Biostatistics 2200 Cph. N > (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 > ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html John R. Gleason Syracuse University 430 Huntington Hall Voice: 315-443-3107 Syracuse, NY 13244-2340 USA FAX: 315-443-4085 PGP public key at keyservers ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
