A small dealership leased 21 Suburu Outbacks on 2-year leases. When the cars were returned at the end of the lease, the mileage was recorded (see below).

40,000 24,941 14,344 17,352 44,735 44,554 20,244

33,353 24,245 41,793 58,309 35,866 25,798 28,998

25,027 43,386 23,908 43,516 53,665 31,835 36,769

Using the 10 percent level of significance,

(b)Calculate the test statistic.(Round your answer to 2 decimal places.)

Test statistic =