The lifetime in miles for a certain brand of tire is normally distributed with a mean of 22,000 miles and a standard deviation of 3,100 miles the tire manufacturer wants to offer a money-back guarantee so that no more than 3% of tires will qualify for a refund. what is the minimum number of miles the manufacturer should guarantee that the tires will last?
(a)-16,170 miles
(b)-15,800 miles
(c)- 27,828 miles
(d)-25,007 miles
Answers: 1
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