Achim Zeileis wrote:
On Wed, 28 Oct 2009, David Croll wrote:
Am I paranoid, or am I in search of an exactness statistics cannot
deliver?
Paranoid. ;-) With your sample size all solutions should be sufficiently
close to exact.
Well, the world could still be out to get him... It is required that
proper tie corrections are applied. Otherwise, the variance of the test
statistic is overestimated and p-values inflated. They are applied in
wilcox.test, so no need to worry. (I think stats packages that do not do
tie corrections would be hard to come by these days.)
--
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c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907
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