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st: Re:Related question -- CI for proportions
I have a related question.
I have a variable with 4 categorical outcomes. I need to calculate CIs on
the proportions and some of the proportions are very low. Due to the low
proportion of some responses, I would prefer to use a binomial exact CI but
pweights are not permitted for this command. This is a cross-sectional
survey so I am currently using the svymean command but only specifying the
weight (psu, strata, fpc are not indicated in my data). This lets me
recode the categorical variable into four binomial
variables. Unfortunately, I cannot find a binomial exact CI option for the
svy commands, nor a method that would allow the correct calculation using
the original multinomial variable (including pweights). Any help in
resolving this problem is appreciated.
At 05:17 PM 18/03/2004 +0000, you wrote:
At 16:37 18/03/04 +1100, Garry Anderson wrote:
I am enquiring if a more appropriate method could be used please to
calculate the 95% CI of the difference between two proportions in the
At the moment it is possible for the upper bound of the confidence
interval of the difference between two proportions to be greater than
1.0. I realize that the approximation that is used is not appropriate for
small sample sizes, however I think that reporting of results that are
impossible should be avoided.
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