Assuming That All Necessary Conditions Are Met, What Needs to Be

Multiple Choice

Assuming that all necessary conditions are met, what needs to be changed in the formula $\tilde { p } \pm t _ { a } \sqrt { \tilde { p } ( 1 - \tilde { p } ) / n }$ so that we can use it to construct a (1 - $\alpha$ ) confidence interval estimate for the population proportion p?

A) should be replaced by p.
B) t _$\alpha$ should be replaced by z _$\alpha$ .
C) t _$\alpha$ should be replaced by t _{$\alpha$ / 2}.
D) t _$\alpha$ should be replaced by z _{$\alpha$ / 2}.