An Average Department Store Sells 150 Men's Suits Per Year

Multiple Choice

An average department store sells 150 men's suits per year. The men's suit departments at a particular national chain of stores claim they sell more than the industry average. In
45 of their stores, they sold, on the average, 250 suits per year with a population standard
Deviation of 30. What is the test value for their claim?

A) 3.33
B) 12.85
C) 0.50
D) 22.36