Re: Analysing performance data (somewhat OT stat question; sorry)

[Mike Miller]

On Thu, 23 Sep 2004, Henry F. Mollet wrote:

> More than rusty myself on stats questions. How about non-parametric test 
> for association if two variable are known *not* to be bivariate normally 
> distributed. E.g. Kendall's coefficient of rank correlation (tau) and 
> Spearman's rank correlation (r_sub_s). See Sokal and Rohlf "Biometry" 
> for details. Mike below suggests a Wilcoxon Rank-Sum test, which I 
> surmise might be something similar.


Is that a question?  If so, what is the question?  The rank-sum test is a 
test of whether two distributions have the same central tendency - a 
"means" test.  You can use Spearman's rank correlation (transform scores 
to ranks, then take Pearson correlation) and test whether it differs 
significantly from zero.

Mike



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