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Re: st: missing standard error because of stratum with single sampling unit


From   sjsamuels@gmail.com
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: missing standard error because of stratum with single sampling unit
Date   Thu, 7 Jan 2010 16:22:33 -0500

It looks like a  bug, and I suggest that you send it to Technical
Support. Be sure to show them (and us) what you see if you run:

svydes hhsize, single gen(bad_strat)

-Steve

On Thu, Jan 7, 2010 at 2:33 AM, Michael Begg <mbstata@gmail.com> wrote:
> Hi,
>
> I am working on a data from a 2 stage survey design with 2 stratum. When I calculate the mean of hhsize, the standard error is missing as shown below.
>
>
> svy: mean hhsize
> (running mean on estimation sample)
>
> Survey: Mean estimation
>
> Number of strata =       2        Number of obs    =      5964
> Number of PSUs   =     194        Population size  =  16041309
>                                  Design df        =       192
>
> --------------------------------------------------------------
>             |             Linearized
>             |       Mean   Std. Err.     [95% Conf. Interval]
> -------------+------------------------------------------------
>      hhsize |   4.656919          .             .           .
> --------------------------------------------------------------
> Note: missing standard error because of stratum with single
>      sampling unit.
>
>

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