Question

An airline is interested in determining the proportion of its customers who are flying for reasons of business. If they want to be 90% certain that their estimate will be correct to within 2 percent, how large a random sample should they select?

Answer 1

a random sample they should select should be 1692 large.

Step-by-step explanation:

Given:

a = 0.1

Z(0.05) = 1.645 (from standard normal table)

n = (Z/E)^2*p*(1 - p)

= (1.645/0.02)^2*0.5*0.5

= 1691.266

Therefore, a random sample they should select should be 1692 large.