The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. Assume the mileage wear follows the normal distribution and the standard deviation of the distribution is 5,000 miles. Crosset Truck Company bought 48 tires and found that the mean mileage for its trucks is 59,500 miles. Is Crosset's experience different from that claimed by the manufacturer at the .05 significance level?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage
the tire can be driven before the tread wears out is 60,000 miles. Assume the mileage
wear follows the normal distribution and the standard deviation of the distribution is
5,000 miles. Crosset Truck Company bought 48 tires and found that the mean mileage for
its trucks is 59,500 miles. Is Crosset's experience different from that claimed by the
manufacturer at the .05 significance level?
Transcribed Image Text:The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. Assume the mileage wear follows the normal distribution and the standard deviation of the distribution is 5,000 miles. Crosset Truck Company bought 48 tires and found that the mean mileage for its trucks is 59,500 miles. Is Crosset's experience different from that claimed by the manufacturer at the .05 significance level?
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