Exhibit 10-9 Two Major Automobile Manufacturers Have Produced Compact Cars with the with the Same

Multiple Choice

Exhibit 10-9
Two major automobile manufacturers have produced compact cars with the same size engines. We are interested in determining whether or not there is a significant difference in the MPG (miles per gallon) of the two brands of automobiles. A random sample of eight cars from each manufacturer is selected, and eight drivers are selected to drive each automobile for a specified distance. The following data show the results of the test.
-Refer to Exhibit 10-9. The mean for the differences is

A) 0.50
B) 1.5
C) 2.0
D) 2.5