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Re: st: Wilcoxon Signed-Rank test.


From   "b.qureishi" <[email protected]>
To   [email protected]
Subject   Re: st: Wilcoxon Signed-Rank test.
Date   Mon, 27 Aug 2007 13:08:12 +0100

Dear Maarten,

I hope you dont mind me privately contacting you.
I have another, Im sure a silly question.

Are you familiar with stepwise function on stata. I have a model that i need to
back test. Im playing around with the function, however, am not making much
progress. Your thoughts and assistance would be most appreciated.

Regards,

Bilal

Quoting "b.qureishi" <[email protected]>:


Thanks Maarten, most appreciated.

I did actually figure it out, and after re-reading my thread I do feel rather
silly. Nonetheless, thanks for getting back to me.

Kind Regards
Bilal

Quoting Maarten buis <[email protected]>:

--- "b.qureishi" <[email protected]> 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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