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Re: st: Wilcoxon Signed-Rank test.


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Wilcoxon Signed-Rank test.
Date   Sun, 26 Aug 2007 10:50:25 +0100 (BST)

--- "b.qureishi" <b.qureishi@ucl.ac.uk> wrote:
> I have normal and non normally distributed data. Im applying the
> Wilcoxon signed-rank test on my non normal variables. However, how
> do I compare and interpet my results againt other non normal
> variables.
> 
> For example, my Z result for Non normal variable X is 3.82, and for
> variable Y the Z value is 2.31.

Are you sure you have performed a signed-rank test(-signrank- in
Stata)? You should never get a result for one variable alone, the test
result is always a comparison of two variables. 

So if you want to use to test whether the distribution of variable X is
the same as the distribution of variable Y you type:
signrank X = Y

Hope this helps,
Maarten


-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


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