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

Peter Dalgaard p.dalgaard at biostat.ku.dk
Wed Dec 21 08:30:56 CET 2005

P Ehlers <ehlers at 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             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907

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