Required information An automobile manufacturer wishes to compare the lifetimes of two brands of tire. She obtains samples of seven tires of each brand. On each of seven cars, she mounts one tire of each brand on each front wheel. The cars are driven until only 20% of the original tread remains. The distances, In miles, for each tire are presented in the following table. Can you conclude that there is a difference between the mean lifetimes of the two brands of tire? Car Brand 1 Brand 2 36975 34318 2 45300 42280 3 36240 35500 4 32100 31950 5 37210 38015 6 48360 47800 7 38200 33215 Compute the value of the test statistic. Round the answer to three decimal places