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Re: st: svymean
Norbert does not say if he is using Stata 8 or 9, though I suspect 8, since
-svymean- under 8 has been superseded by -svy: mean- under 9.
No matter. Both -test- and -lincom- will work after either release.
So, for example under release 9:
svy: mean var1, over(var2)
test [var1]High = [var1]Low
or, especially if you like confidence intervals:
lincom [var1]High - [var1]Low
...assuming High and Low are valid value labels for the grouping variable var2.
I don't have my release 8 manuals with me, but from memory:
svymean var1, by(var2)
test [var1]High = [var1]Low
For variety, and the brevity of a single command, you could (release 9):
svy: regress var1 var2
or (release 8)
svyregress var1 var2
asuming var2 was coded as a 0/1 variable.
Quoting Clive Nicholas <Clive.Nicholas@newcastle.ac.uk>:
> Norbert Michel wrote:
> > When using the survey command svymean, what, exactly, is the
> > interpretation of the design effect "deff" in the output?
> Check out
> for more on this and other fruit fancies about doing -svy:- analysis in
> Stata. You have to scroll down a bit to learn about -deff-, but you've got
> _lots_ of useful material to go with it, and two neat movies to watch as
> > Also, if I want to run a difference in means test (using survey data),
> > do I have to do this manually?
> Looking at the options covered by -whelp survey-, that looks tough to do
> if you're looking to get output test statistics. The closest I can get you
> there is
> . svy: mean x, over(y)
> assuming that -x- is continuous and -y- is categorical. But it doesn't
> give t-test-style statistics along with this. Maybe this is correct or
> maybe it's an oversight: hard to say.
> Perhaps other listees can help you out on this point.
> Hope this helps.
> CLIVE NICHOLAS |t: 0(044)7903 397793
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- st: svymean
- From: "Norbert Michel" <Norbert.Michel@nicholls.edu>
- Re: st: svymean
- From: "Clive Nicholas" <Clive.Nicholas@newcastle.ac.uk>