Re: st: ranksum/Mann-Whitney command

[Roger Newson <roger.newson@kcl.ac.uk>]

At 19:38 26/08/2004, Holly wrote:
> Hello,
>
> I would like to use the ranksum command on a sample population but the
> command does not take weights.  Does anyone know of a command that will give
> me the same  results for weighted data?
Maybe my own -somersd- package (downloadable from SSC) is what you are 
looking for. To find more about it it, type

ssc describe somersd

The -somersd- package can use frequency or probability weights, and 
calculates confidence limits for the 2 parameters corresponding to the 
ranksum test, namely Somers' D and the Hodges-Lehmann median difference. It 
comes with 2 .pdf manuals, and a reference to a Stata Journal paper on the 
subject (Newson, 2002), which can be downloaded as a pre-publication draft 
from my website.

I hope this helps.

Best wishes

Roger

References

Newson R. 2002. Parameters behind "nonparametric" statistics: Kendall's 
tau, Somers' D and median differences. The Stata Journal 2(1): 45-64.
A pre-publication draft of this paper can be downloaded from my website. In 
net-aware Stata, type

net from http://www.kcl-phs.org.uk/rogernewson/papers

to find how to do this.



--
Roger Newson
Lecturer in Medical Statistics
Department of Public Health Sciences
King's College London
5th Floor, Capital House
42 Weston Street
London SE1 3QD
United Kingdom

Tel: 020 7848 6648 International +44 20 7848 6648
Fax: 020 7848 6620 International +44 20 7848 6620
  or 020 7848 6605 International +44 20 7848 6605
Email: roger.newson@kcl.ac.uk
Website: http://www.kcl-phs.org.uk/rogernewson

Opinions expressed are those of the author, not the institution.

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