the sample mean of the dichotomous (one_zero, dummy) variable is known, It
is the proportion.
Gus Gassmann wrote:
> Dennis Roberts wrote:
>
> > this is pure speculation ... i have yet to hear of any convincing case
> > where the variance is known but, the mean is not
>
> What about that other application used so prominently in texts of
> business statistics, testing for a proportion?
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