24. Hypothesis Test for Difference in Car>Taxi Ages When the author visited Dublin in Ireland (home of Guinness Brewery employee William Gosset, who first developed the t distribution), he recorded the ages of randomly selected passenger cars and randomly selected taxis. (There is no end to the fun of traveling with the author.) The ages (in years) are listed below. Use a 0.05 significance level to test the claim that there is a difference between the mean age of a Dublin car and the mean age of a Dublin taxi. We might expect that taxis would be newer, but what do the results suggest?

Cars Taxis 4 0 8 11 14 3 4 4 3 5 8 8 0 3 8 4 3 3 6 11 8 3 3 7 4 6 6 1 8 2 7 7 6 9 5 10 8 4 3 4 15 11 4 1 6 1 8