Answered: Mileages for tires before they are…

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....

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9.) Mileages for tires before they are replaced are normally distributed with mean 45,000 miles and standard deviation 1,800 miles.

a.) What is the probability that tires will be replaced in under 32,000 miles?

b.) If a company wants to offer a warranty so that only the bottom 3% of their tires get replaced, then for how many miles should the warranty for the tires be? Round to the nearest thousand miles.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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