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Re: st: Q1, Median & Q3 for pweighted svy data.
From
Steven Samuels <[email protected]>
To
[email protected]
Subject
Re: st: Q1, Median & Q3 for pweighted svy data.
Date
Thu, 27 Jan 2011 16:23:53 -0500
--
-pctile- will accept -pweights-, but, unlike -scsomersd-, provides no
measures of variability for the estimated percentiles.
Steve
Steven J. Samuels
[email protected]
18 Cantine's Island
Saugerties NY 12477
USA
Voice: 845-246-0774
Fax: 206-202-4783
On Jan 27, 2011, at 2:53 PM, Roger Newson wrote:
This sounds like a job for the -scsomersd- package, which you can
download from SSC. The -scsomersd- package can calculate confidence
intervals for medians, and other percentiles, adjusted for clustering
and/or sampling probability weights. However, it does not (yet) cater
for sampling strata, so the confidence intervals will be (if anything)
conservative if you have used sampling strata.
The -scsomersd- package requires the -somersd- and -expgen- packages
in order to work. Both of these packages can also be downloaded from
SSC.
I hope this helps.
Best wishes
Roger
Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
UNITED KINGDOM
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Email: [email protected]
Web page: http://www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/
Opinions expressed are those of the author, not of the institution.
On 27/01/2011 19:46, Michael Costello wrote:
I have a data set with weighted data and a svyset command attached to
the database. I'm trying to get the 5 number summary (Min, Q1, Med,
Q3, Max) of the data in some kind of weighted form. Is this possible?
-M.
--
Michael Costello
Intern, RTI International
MS Candidate, Statistics 2011
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