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Re: st: Save the percentage of each response category into new variables
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: Save the percentage of each response category into new variables
Date
Fri, 9 Sep 2011 22:13:55 +0100
-ci, binomial- was updated several years ago to include options that
always produce intervals in [0,1].
Nick
On Fri, Sep 9, 2011 at 10:03 PM, Steven Samuels <[email protected]> wrote:
> -svy tab-, with a "ci" option uses the logit transform by default and for proportions, not for percentages. It can be used for ordinary, non-survey, data by preceding the -svy tab- command with
>
> svyset _n
>
>
> Steve
>
>
> On Sep 9, 2011, at 3:42 PM, Bryan Sayer wrote:
>
> While it is true that the mean of a 0/1 variable is equal to the proportion, the confidence interval obtained this way may go below zero or above one, which is generally an undesirable characteristic.
>
> Some software will use a logit transformation to prevent this, but only when doing confidence intervals of actual percentages.
>
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