a. What is the probability that a laser fails before 6060 hours? b. If 9 lasers are used in a product and they are assumed to fail independently, find the standard deviation of the average lifetime of these lasers. (unit: hours) c. If 9 lasers are used in a product and they are assumed to fail independently, what is the probability that there are exactly 4 lasers failing before 6060 hours?
a. What is the probability that a laser fails before 6060 hours? b. If 9 lasers are used in a product and they are assumed to fail independently, find the standard deviation of the average lifetime of these lasers. (unit: hours) c. If 9 lasers are used in a product and they are assumed to fail independently, what is the probability that there are exactly 4 lasers failing before 6060 hours?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Question 2:
The lifetime of a semiconductor laser at a constant gower is
a. What is the probability that a laser fails before 6060 hours?
b. If 9 lasers are used in a product and they are assumed to fail independently, find the standard deviation of the average lifetime of these lasers. (unit: hours)
c. If 9 lasers are used in a product and they are assumed to fail independently, what is the probability that there are exactly 4 lasers failing before 6060 hours?
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