question archive An electrical component is designed to provide a mean service life of 3000 hours, with a standard deviation of 800 hours
An electrical component is designed to provide a mean service life of 3000 hours, with a standard deviation of 800 hours
Subject:MathPrice: Bought3
An electrical component is designed to provide a mean service life of 3000 hours, with a standard deviation of 800 hours. A customer purchases a batch of 50 components, which can be considered a simple random sample of the population of components.
a) What is the probability that the mean life for the group of 50 components will be more than 2750 hours? (Draw the bell curve)
b) What is the probability that the mean life for the group of 50 components will be between 2900 and 3200 hours? (Draw the bell curve)
