The life span of a car​ tire, calculated in​ miles, is normally​ distributed, with a mean of 70,000 miles and a standard deviation of 5,500 miles. If the tire manufacturer wants to ensure that less than​ 4% of all tires fail under​ warranty, how many miles should each tire be​ guaranteed?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The life span of a car​ tire, calculated in​ miles, is normally​ distributed, with a mean of 70,000 miles and a standard deviation of 5,500 miles. If the tire manufacturer wants to ensure that less than​ 4% of all tires fail under​ warranty, how many miles should each tire be​ guaranteed?

 

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