Wilcoxon Mann-Whitney Rank Sum Test in R
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.
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