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The average number of miles (in thousands) that a car's tire will function before needing replacement is 73 and the standard deviation is 12. 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 ? N 73 3.0984 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 69.2 and 73.3. 0.1942 X d. For the 15 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 69.2 and 73.3. 0.1942 X e. For part d), is the assumption that the distribution is normal necessary? No Yes 12 Question Help:Written Example Message instructor Submit Question Q

The average number of miles (in thousands) that a car's tire will function before needing replacement is 73 and the standard deviation is 12. 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 ? N 73 3.0984 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 69.2 and 73.3. 0.1942 X d. For the 15 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 69.2 and 73.3. 0.1942 X e. For part d), is the assumption that the distribution is normal necessary? No Yes 12 Question Help:Written Example Message instructor Submit Question Q

MATLAB: An Introduction with Applications
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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The average number of miles (in thousands) that a car's tire will function before needing replacement is 73 and the standard deviation is 12. 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 ? N 73 E 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 69.2 and 73.3. 0.1942 X 12 3.0984 d. For the 15 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 69.2 and 73.3. 0.1942 X e. For part d), is the assumption that the distribution is normal necessary? No Yes Question Help: Written Example Message instructor Submit Question 4 a
Transcribed Image Text:The average number of miles (in thousands) that a car's tire will function before needing replacement is 73 and the standard deviation is 12. 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 ? N 73 E 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 69.2 and 73.3. 0.1942 X 12 3.0984 d. For the 15 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 69.2 and 73.3. 0.1942 X e. For part d), is the assumption that the distribution is normal necessary? No Yes Question Help: Written Example Message instructor Submit Question 4 a
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