Dear colleagues,
Could someone direct me to a reference for calculating the 95% CI for the
difference between two proportions when each treatment group has only 20
patients.
I was thinking of Fleiss' text "Statistical methods for rates and
proportions" but I don't have immediate access so I need to order it and
that means I would have to wait at least two weeks. I would therefore
prefer another reference or alternatively if there is a formula could use,
I'd appreciate that.
Thanks.
Marjorie Thomas
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