Suppose a clothing store wants to determine the current percentage of customers who are over the age of forty. how many customers should the company survey in order to be 92% confident that the estimated (sample) proportion is within 5 percentage points of the true population proportion of customers who are over the age of forty?

z0.16 z0.08 z0.04 z0.02 z0.01
0.994 1.405 1.751 2.054 2.326
use the table of values above.