Avis Rent A Car maintains a fleet of low mileage cars for its customer base. Suppose that Avis would like to promote the fact that its cars have a lower average mileage than that of its competitors in an advertising campaign. To support this claim, Avis has collected the following mileage data from a random sample of rental cars from its own fleet and the fleets of three competitors. Hint: To help make the calculations more manageable, consider converting the mileage into thousands of miles (for example, 13,100 = 13.1). These data can also be found in the Excel file Avis. xlsx.

a. Using α = 0.05, determine if there is a difference in the average mileage between these four companies.

b. Using α = 0.05, determine if there is evidence to support the claim made by Avis.

c. Verify your results with Excel or PHStat.

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13,100 7.800 10.400 14,600 8,600 Hertz 15,900 11,400 5,600 10,100 16,000 National 15,300 21,800 18,100 12,800 20,500 Enterprise 14,500 20,000 17,400 24.800 16,300