2. 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). What is the probability that a randomly-selected CD player will have to be replaced in 8 years or less? Z-score:
2. 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). What is the probability that a randomly-selected CD player will have to be replaced in 8 years or less? Z-score:
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question

Transcribed Image Text:2. 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). What is the probability that a randomly-selected CD
player will have to be replaced in 8 years or less?
Z-Score:

Transcribed Image Text:Standard Normal Table
z .0
1 .2
3
.4
.5
.6
.7
.8
.9
-3 0013
0010
.0007
.0005
0003
0002
0002
„0001
.0001
.0000+
-2 0228
0179
.0139
.0107
0082
.0062
0047
0035
.0026
0019
-1
.1587
.1357
.1151
0968
0808
.0668
0548
0446
.0359
.0287
-0
5000
4602
4207
3821
3446
3085
2743
2420
2119
.1841
0 5000
5398
5793
6179
.6554
.6915
7257
7580
7881
8159
1
8413
8643
8849
9032
9192
9332
9452
9554
9641
9713
2 9772
9821
9861
9893
.9918
9938
9953
9965
9974
9981
3
9987
9990
9993
9995
9997
9998
9998
9999
9999
1.0000
MIT
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