Question: Two different models of cars were tested for gas mileage. Test the claim that the models have the same gas mileage at the .05 level. Assume the variance to be unequal. State the hypothesis and identify the claim, find the critical values, compute the test value, make the decision, and summarize the results.

Car A Car B

n1 = 9 n2 = 13

x1 = 28.6 x2 = 32.1

s1 = 4.1 s2 = 2.1