Question 4

A tire company measures the tread on newly-produced tires and finds that they are normally distributed with a mean depth of 0.84mm and a standard deviation of 0.35mm. Find the probability that a randomly selected tire will have a depth less than 0.24mm. Would this outcome warrant a refund (meaning that it would be unusual)?

A)Probability of 0.96 and would warrant a refund

B)Probability of 0.04 and would not warrant a refund

C)Probability of 0.96 and would not warrant a refund

D)Probability of 0.04 and would warrant a refund

Question 5

A grocery stores studies how long it takes customers to get through the speed check lane. They assume that if it takes more than 10 minutes, the customer will be upset. Find the probability that a randomly selected customer takes more than 10 minutes if the average is 7.45 minutes with a standard deviation of 1.04 minutes.

A)0.993

B)0.501

C)0.071

D)0.007