If bolt thread length is normally distributed, what is the probability that the thread length of a randomly selectedbolt isa. Within 1.5 standard deviations of its mean value?b. Farther than 2.5 standard deviations from its mean value?c. Between 1 and 2 standard deviations from its mean value?

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Answered: If bolt thread length is normally…

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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A. Solve the following. Show your complete solution. 1. Say that you will have to wait for a bus. Assume that the amount of waiting time is normally distributed between 0 and 15 minutes. Suppose that the mean time of a person is 8 minutes and the standard deviation is 1.8. What is the probability that you will wait for less than 12.5 minutes? 2. The length of time between charges of the battery of laptops is normally distributed with a mean of 45 hours and a standard deviation of 12 hours. Fiel owns one of these laptops and wants to know the probability that the length of time will be between 50 and 70 hours. 3. The length of life of an ordinary flashlight produced by a company has a normal distribution with a mean of 36 months and a standard deviation of 5 months. Find the probability that the flashlight produced by the company will last (a) more than 18 months, (b) between 17 and 32 months.
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If bolt thread length is normally distributed, what is the probability that the thread length of a randomly selected bolt is a. Within 1.5 standard deviations of its mean value? b. Farther than 2.5 standard deviations from its mean value? c. Between 1 and 2 standard deviations from its mean value?