Rental car gasoline prices per gallon were sampled at eight major airports. Data for Hertz and National car rental companies follow (USA Today, April 4, 2000).
|
Airport
|
Hertz
|
National
|
Airport
|
Hertz
|
National
|
|
Boston Logan
|
1.55
|
1.56
|
New York (JFK)
|
1.72
|
1.51
|
|
Chicago O'Hare
|
1.62
|
1.59
|
New York (LaGuardia)
|
1.67
|
1.50
|
|
Los Angeles
|
1.72
|
1.78
|
Orange County, CA
|
1.68
|
1.77
|
|
Miami
|
1.65
|
1.49
|
Washington (Dulles)
|
1.52
|
1.41
|
Use α = .05 to test the hypothesis of no difference between the population mean prices per gallon for the two companies.