Answered: A firm makes MP3 players. The research…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A firm makes MP3 players. The research department at this firm found that the life of the

MP3 players is normally distributed with a mean of 4900 hours and a standard deviation

of 450 hours. How many playing hours should a warranty cover if the firm wants 7% of

the MP3 players to be below this amount?

5566

4234

4900

1.48

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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