Browsing by Australian Curriculum Mathematical Methods

use the approximate confidence interval (pˆ−z(pˆ(1−pˆ)/n‾‾‾‾‾‾‾‾‾‾‾‾√, pˆ+z(pˆ(1−pˆ)/n‾‾‾‾‾‾‾‾‾‾‾‾√),p̂-z(p̂(1-p̂)/n, p̂+z(p̂(1-p̂)/n, as an interval estimate for pp, where zz is the appropriate quantile for the standard normal distribution