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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.
Driver
Manufacturer A
Manufacturer B
1
32
28
2
27
22
3
26
4
24
5
25
6
29
7
31
8
The test statistic is:
A. 1.645
B. 1.96
C. 2.096
D. 2.256
Formulate the null and alternative hypotheses for this application.
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