The average number of miles (in thousands) that a car's tire will function before needing replacement is 66 and the standard deviation is 17. Suppose that 42 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution. What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) 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 63.5 and 66.1. For the 42 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 63.5 and 66.1.

The average number of miles (in thousands) that a car's tire will function before needing replacement is 66 and the standard deviation is 17. Suppose that 42 randomly selected tires are tested. Round all answers to 4 decimal places where possible and assume a normal distribution. What is the distribution of ¯xx¯? ¯xx¯ ~ N(,) 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 63.5 and 66.1. For the 42 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 63.5 and 66.1.

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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What is the distribution of ¯xx¯? ¯xx¯ ~ N(,)
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 63.5 and 66.1.
For the 42 tires tested, find the probability that the average miles (in thousands) before need of replacement is between 63.5 and 66.1.

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