The life of a semiconductor laser at a constant power is normally distributed with a mean of 7000 hours and a standard deviation of 600 hours. What is the probability that a laser fails before 5000 What is the life in hours that 95% of the lasers exceed? hours? What is the probability that a laser fails after 8500 hours? What life in hours does 75% of the lasers exceed?

The life of a semiconductor laser at a constant power is normally distributed with a mean of 7000 hours and a standard deviation of 600 hours. What is the probability that a laser fails before 5000 What is the life in hours that 95% of the lasers exceed? hours? What is the probability that a laser fails after 8500 hours? What life in hours does 75% of the lasers exceed?

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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