Answered: determine the number of bearings in a…

determine the number of bearings in a batch of 1200 likely (a)to fail before 1200 hours (b)to last for more than 1500 hours.

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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Question

A type of bearing has an average life of 1500 hours and a standard deviation of 40 hours. Assuming anormal distribution, determine the number of bearings in a batch of 1200 likely
(a)to fail before 1200 hours

(b)to last for more than 1500 hours.

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