Question

Stats Q; The Canadian Automobile Association (CAA) recently performed a 5 mph crash test on several
different types of large family cars (population 1) and several different types of large luxury cars
(population 2). The front of each car was driven into an angle barrier and then the repair costs were
calculated. The resulting 95% confidence interval for µ 1 − µ 2 was determined to be (−$149, $52).
Which of the following is the correct interpretation of this interval?

Answer 1

(A) The cost of repairing luxury cars is anywhere from $52 to $149 more than the cost of repairing
family cars, on average
(B) The cost of repairing luxury cars is anywhere from $52 to $149 less than the cost of repairing
family cars, on average
(C) The cost of repairing luxury cars is anywhere from $149 more to $52 less than the cost of
repairing family cars, on average
(D) The cost of repairing luxury cars is anywhere from $149 less to $52 more than the cost of
repairing family cars, on average

Answer 2

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