[R] Wilcoxon-Mann-Whitney U value: outcomes from different stat packages

[(Ted Harding)]

On 30-May-2012 07:33:12 peter dalgaard wrote:
> 
> On May 29, 2012, at 17:55 , maxbre wrote:
>> Given this example
>> [snip]
>> And given the fact that:
>> 
>> - in the note of R Wilcox.test is clearly stated: "The literature
>> is not unanimous about the definitions of the Wilcoxon rank sum
>> and Mann-Whitney tests. The two most common definitions correspond
>> to the sum of the ranks of the first sample with the minimum value
> subtracted or not. R subtracts [...], giving a value which is larger
>> by m(m+1)/2 for a first sample of size m"
>> 
> 
> NB: You are quoting like the Devil reads the Bible: The bit in [...]
> is "and S-PLUS does not". So R's value is _smaller_ by m(m+1)/2. 
> [snip]

Since Peter would seem to be unique in the fortune of being able
to observe the Devil reading the Bible, I propose that this be
added to the Fortunes of us all.

Ted.

-------------------------------------------------
E-Mail: (Ted Harding) <Ted.Harding at wlandres.net>
Date: 01-Jun-2012  Time: 00:05:40
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