Question 19 In crash tests the mean bumper repair cost for 14 randomly selected small cars is $473 with a standard deviation of $190. In similar tests the mean bumper repair cost for 23 randomly selected midsize cars is $741 with a standard deviation of $205. At 0.05 significance level, can you conclude that the mean bumper repair cost is less for small size cars than it is for midsize cars? Find the Test Statistic (use calculator). t = 4.0376 t = -4.0376 None of these t = 3.9618 t = -3.9618
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