Confidence interval for one sample proprtion

drjjbarnette

I reviwing the one sample 0.95 tI for a proportion, if one follows the text description we  would use:

p +/- 1.96 SQRT pq/n

 

Resuts from JMP do not collaborate the result using the equation above,  Plus, the mean for the LL and UL is not p.  

 

Can anyone tell me why JMP provides different results>

dale_lehman

Please post an example of what you are talking about.  When I produce a 95% confidence interval for a proportion, I indeed get the textbook formula result, except for possible rounding differences.  So, you need to show an example of what you mean.