True. I think the formula makes more sense, so I will
it for now. However, I will continue to wait for an
expert on svy commands in our listserve to comment on
this issue.
Thanks
Anju
--- Nick Cox <[email protected]> wrote:
> You have not yet heard one -svy- expert
> agree with my guess! (Like Scott, I
> don't use survey data.)
>
> Nick
> [email protected]
>
> anju parthan
>
> > Thanks a lot Nick.
> >
> > I think I am going to use the generate command and
> > calculate the zscore.
>
> Nick Cox
> >
> > > No, I wasn't referring or alluding to
> > > this FAQ, but it clearly points you
> > > in the right direction.
> > >
> > > Suppose for example you
> > >
> > > . use
> http://www.stata-press.com/data/r8/nmihs.dta
> > >
> > > . svymean age
> > >
> > > Survey mean estimation
> > >
> > > pweight: finwgt
>
> > > Number of obs = 9953
> > > Strata: stratan
>
> > > Number of strata = 6
> > > PSU: <observations>
>
> > > Number of PSUs = 9953
> > >
>
> > > Population size = 3898922
> > >
> > >
> >
>
--------------------------------------------------------------
> > ----------------
> > > Mean | Estimate Std. Err. [95% Conf.
> > > Interval] Deff
> > >
> >
>
---------+----------------------------------------------------
> > ----------------
> > > age | 26.28999 .0775855 26.1379
> > > 26.44207 1.920533
> > >
> >
>
--------------------------------------------------------------
> > ----------------
> > >
> > > It would seem that you can then knit your own
> > > standardized score by
> > >
> > > . gen stdage = (age - _b[age]) / (
> > > _se[age]*sqrt($S_E_nobs/S_E_deff[1,1]))
> > >
> > > However, on -svy-, never believe an answer
> unless
> > > experts on -svy- agree.
> > >
> > > Nick
> > > [email protected]
> > >
> > > anju parthan
> > >
> > > > Thanks. I am not sure I understood your
> comment.
> > > >
> > > > Are you referring to the explanation given by
> > > William
> > > > Sribney in the following link
> > > >
> > > >
> > >
> >
>
http://www.stata.com/support/faqs/stat/supweight.html
> > >
> > >
> > > > --- Nick Cox <[email protected]> wrote:
> > > >
> > > > > Neither -zscore- nor -center- supports
> > > > > pweights.
> > > > >
> > > > > This seems to be the first mention in this
> > > > > thread of survey data. Is the concept of
> > > > > standard deviation well defined for survey
> > > > > data? If not, the whole idea of a
> standardized
> > > > > variable would appear not defined in turn.
>
> *
> * For searches and help try:
> *
> http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
=====
____________________________________________________________
Anju Parthan,
Doctoral Candidate,
The University of Texas at Austin, PHAR-PHARMACY ADMIN
1 UNIVERSITY STATION A 1930, AUSTIN, TX-78712
Tel: (512) 459-4942; Fax: (512) 471-8762
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