The average number of miles (in thousands) that a car's tire will function before needing replacement is 73 and the standard deviation is 17. Suppose that 15 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution. a. What is the distribution of X? XN 73 b. What is the distribution of ? N73 c. If a randomly selected individual tire is tested, find the probability that the number of miles (in thousands) before it will need replacement is between 71.6 and 78.1. 0.3811 17 0 0 d. For the 15 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 71.6 and 78.1. e. For part d), is the assumption that the distribution is normal necessary? Yes No o

The average number of miles (in thousands) that a car's tire will function before needing replacement is 73 and the standard deviation is 17. Suppose that 15 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution. a. What is the distribution of X? XN 73 b. What is the distribution of ? N73 c. If a randomly selected individual tire is tested, find the probability that the number of miles (in thousands) before it will need replacement is between 71.6 and 78.1. 0.3811 17 0 0 d. For the 15 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 71.6 and 78.1. e. For part d), is the assumption that the distribution is normal necessary? Yes No o

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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