Exhibit 2 (Questions 8-12)

In order to determine whether or not there is a significant difference between the hourly wages of two companies, the following data have been accumulated.

Company A

Company B

Sample size

80

60

Sample mean

$16.75

$16.25

Population standard deviation

$1.00

$0.95

Refer to Exhibit 2. A point estimate for the difference between the two population means is

A. 20

B. 0.50

C. 0.25

D.1.00