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The Tread Life of Tires Mounted on Light-Duty Trucks Follows

Question 43

Multiple Choice

The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. Suppose you bought a set of four tires,what is the likelihood the mean tire life of these four tires is between 57,000 and 63,000 miles?


A) 0.4332
B) 0.8664
C) 1.00
D) Very likely

Correct Answer:

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