5. In crash tests at 5 mph, the mean bumper repair cost for 14 randomly selected

small cars is $574 with a standard deviation 0f $185. In similar tests of 23

randomly selected midsize cars, the mean bumper repair cost is $734 with a

standard deviation of $268. At a= 0.10, test the claim that the mean bumper repair cost is less for small cars than it is for midsize cars.

a)

b)

c)

d)

e)