The plant manager for the local electric utility company wants to know the reliability of one of his small hydroelectric power generating systems.This system is comprised of two components: a generator which has a random failure rate of one in every two years of operation; and a transformer which has a random failure rate of one in every five years of operation.If the transformer has a mean time to wear-out of 20 years with a standard deviation of 2 years,what service life should the manufacturer specify in order to have a .9332 probability that it will last at least that long before failing?
A)17 years
B)18 years
C)19 years
D)20 years
E)21 years

Question

Quizplus · Accepted Answer

The Answer of The plant manager for the local electric utility company wants to know the reliability of one of his small hydroelectric power generating systems.This system is comprised of two components: a generator which has a random failure rate of one in every two years of operation; and a transformer which has a random failure rate of one in every five years of operation.If the transformer has a mean time to wear-out of 20 years with a standard deviation of 2 years,what service life should the manufacturer specify in order to have a .9332 probability that it will last at least that long before failing?
A)17 years
B)18 years
C)19 years
D)20 years
E)21 years

The Plant Manager for the Local Electric Utility Company Wants