Replacement Times for T

Essay

Replacement times for T.V. sets are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years (based on data from "Getting Things Fixed," Consumers Reports).
(a) Find the probability that a randomly selected T.V. will have a replacement time between 6.5 and 9.5 years.
(b) Find the probability that a randomly selected T.V. willhave a replacement time between 9.5 and 10.5 years. Draw the diagram for each and discuss the part of the solution that would be different in finding the requested probabilities.