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Re: st: variance calculation, stratified sample
From
Steve Samuels <[email protected]>
To
[email protected]
Subject
Re: st: variance calculation, stratified sample
Date
Tue, 21 Sep 2010 11:17:49 -0400
--
-svyset- followed by -svy: prop- or -svy: tabulate- will do it. The
-help- for "survey" will guide you to those commands.
With simple random sampling within strata, no hypothesis testing, the
commands would be:
svyset _n [pw =wh], strata(stratum_var) fpc(Nh)
svy: prop x
// or
svy: tab x //better CIs with very small or large proportions
Note that "Stata" is not spelled "STATA"
Regards,
Steve
Steven J. Samuels
[email protected]
18 Cantine's Island
Saugerties NY 12477
USA
Voice: 845-246-0774
Fax: 206-202-4783
On Tue, Sep 21, 2010 at 10:05 AM, Klas Rydenstam
<[email protected]> wrote:
> I have a stratified sample with stratum weights wh= Nh/nh. The
> stratum
> sizes are known. The samples are not proportional to stratum sizes.
> The
> task is to calculate variances for proportions, e.g. the proportion of
> a category of objects with a particular characteristic. How can I do
> that with STATA11?
> Klas
> [email protected]
>
> *
> * For searches and help try:
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> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
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