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st: proportion confidence intervals <0 and >1 in MI SVY


From   Paul Shattuck <pshattuck@wustl.edu>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: proportion confidence intervals <0 and >1 in MI SVY
Date   Tue, 11 May 2010 12:44:52 +0000

Hi,

I am analyzing imputed survey data using the MI SVY estimation commands. I am estimating proportions and requesting confidence intervals (syntax below). However, many of the confidence intervals are falling outside of 0,1 bounds. The tab confidence intervals available in plain SVY (without MI) are generated using a logistic transform that prevents this problem. However, the tab procedure is not available in MI estimation. 

Can anyone suggest a work-around that will let me obtain proportion confidence intervals in MI SVY estimation that remain within the 0,1 bounds?

mi estimate: svy, subpop(if var1==1): proportion var2

Thank you,

Paul





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