The estimated service life of a part is normally distributed with a mean of 500 hours and a standard deviation of 40 hours.Determine the probability of failing in these intervals :
(i)before its mean life(ii)after 450 hours of operation(iii)between 540 hours and 600 hours

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The Answer of The estimated service life of a part is normally distributed with a mean of 500 hours and a standard deviation of 40 hours.Determine the probability of failing in these intervals :
(i)before its mean life(ii)after 450 hours of operation(iii)between 540 hours and 600 hours

The Estimated Service Life of a Part Is Normally Distributed