How many standard deviations away from the mean is a CD player that lasts 8 years? What is the probability that a randomly-selected CD player will have to be replaced in 8 What is the probability that a CD player will last less than 6 years? What is the probability that a CD player will lasts between 6-8 years? What is the cut off for an unusually short time for a CD player to last? What is the cut off for an unusually long time for a CD player to last? dec dec dec % unit

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
Question

Replacement times for CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years (data from Consumer Reports).  

How many standard deviations away from the mean is a CD player that lasts 8 years?
What is the probability that a randomly-selected CD player will have to be replaced in 8
What is the probability that a CD player will last less than 6 years?
What is the probability that a CD player will lasts between 6-8 years?
What is the cut off for an unusually short time for a CD player to last?
What is the cut off for an unusually long time for a CD player to last?
dec
dec
dec
%
%
units
unite
Transcribed Image Text:How many standard deviations away from the mean is a CD player that lasts 8 years? What is the probability that a randomly-selected CD player will have to be replaced in 8 What is the probability that a CD player will last less than 6 years? What is the probability that a CD player will lasts between 6-8 years? What is the cut off for an unusually short time for a CD player to last? What is the cut off for an unusually long time for a CD player to last? dec dec dec % % units unite
Expert Solution
Step 1

Given Information:

Mean μ=7.1

Standard deviation σ=1.4

 

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