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st: Non-parametric tests and weights


From   Marcello Pagano <pagano@hsph.harvard.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Non-parametric tests and weights
Date   Tue, 01 Feb 2005 10:06:30 -0500

A question from Heather Carroll:

Why the nonparametric tests like kruskal wallis (kwallis) or wilcoxon (ranksum) do not accept the use of sampling weights. Are these statistics not biased no matter what the sampling design is?


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