A tire manufacturer claims (based on years of experience with its tires) that the mean mileage is
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A tire manufacturer claims (based on years of experience with its tires) that the mean mileage is 35,000 miles and the standard deviation is 5000 miles. A consumer agency randomly selects 100 of these tires and finds a sample mean of 31,000.
Should the consumer agency doubt the manufacturer’s claim?
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Amartya Saha
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Related Book For 
Just The Essentials Of Elementary Statistics
ISBN: 9780495314875
10th Edition
Authors: Robert Johnson, Patricia Kuby
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