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1. According to a recent report, replacement times for CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years. (a) Find the probability that a randomly selected CD player will have a replacement time of less than 8.0 years. (b) Find the probability that a randomly selected CD player will have a replacement time of more than 9.0 years. (c) Find the probability that a randomly selected CD player will have a replacement time between 5 and 8 years. (d) Find the probability that a randomly selected CD player will have a replacement time of less than 5.1 or greater than 9.1 years.

1. According to a recent report, replacement times for CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years. (a) Find the probability that a randomly selected CD player will have a replacement time of less than 8.0 years. (b) Find the probability that a randomly selected CD player will have a replacement time of more than 9.0 years. (c) Find the probability that a randomly selected CD player will have a replacement time between 5 and 8 years. (d) Find the probability that a randomly selected CD player will have a replacement time of less than 5.1 or greater than 9.1 years.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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1. According to a recent report, replacement times for CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years. (a) Find the probability that a randomly selected CD player will have a replacement time of less than 8.0 years. (b) Find the probability that a randomly selected CD player will have a replacement time of more than 9.0 years. (c) Find the probability that a randomly selected CD player will have a replacement time between 5 and 8 years. (d) Find the probability that a randomly selected CD player will have a replacement time of less than 5.1 or greater than 9.1 years.
Transcribed Image Text:1. According to a recent report, replacement times for CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years. (a) Find the probability that a randomly selected CD player will have a replacement time of less than 8.0 years. (b) Find the probability that a randomly selected CD player will have a replacement time of more than 9.0 years. (c) Find the probability that a randomly selected CD player will have a replacement time between 5 and 8 years. (d) Find the probability that a randomly selected CD player will have a replacement time of less than 5.1 or greater than 9.1 years.
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