Re: [R] Wilcoxon Mann-Whitney Rank Sum Test in R

From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>
Date: Wed 21 Dec 2005 - 18:30:56 EST

P Ehlers <ehlers@math.ucalgary.ca> writes:

> > so a good guess at its definition is that it is obtained from W or one
> > of the others by subtracting the mean and dividing with the SD.
> >
>
> With the SD adjusted for ties, of course. (See, e.g., Conover's book.)

...which is actually the exact SD, conditional on the set of tied ranks, not just a correction term. See my discussion with Torsten a month or so ago.

-- 
   O__  ---- Peter Dalgaard             ุster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
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Received on Wed Dec 21 18:41:01 2005

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