Assuming that all necessary conditions are met, what needs to be changed in the formula
, so that we can use it to construct a confidence interval estimate for the population proportion p?
A) The p̂ should be replaced by p.
B) The t
a should be replaced by z
a.
C) The t
a should be replaced by t
a/2.
D) The t
a should be replaced by z
a/2.
E) The p̂ should be replaced by z
a/2.