Answered: A tire company makes tires that have a…

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 tire company makes tires that have a normal distribution with a mean of 70000 miles with a standard deviation of 2000 miles prior to needing replacement. A tire that wears out in the bottom 2% of miles lasted before needing replacement is considered very poorly made. Use R/Rcmdr to find the highest number of miles that a tire would have to last to be considered very poorly made. Carry all decimals in your work. Choose the most correct (closest) answer?

a.28925.02

b.65,892.5

c.74107.5

d.111074.98

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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