The life of a semiconductor laser at a constant power is normally distributed with a mean of
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Question:
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.
a. What is the probability that a laser fails before 5000 hours?
b. What is the life in hours that 95% of the lasers exceed?
c. If 3lasers are used in a product and they are assumed to fail independently, what is the probability that all three are still operating after 7000 hours?
Related Book For
Statistics for Business and Economics
ISBN: 978-0132930192
8th edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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