Answered: Car speeds John Beale of Stanford, CA,…

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

Car speeds John Beale of Stanford, CA, recorded the
speeds of cars driving past his house, where the speed
limit was 20 mph. The mean of 100 readings was
23.84 mph, with a standard deviation of 3.56 mph. (He
actually recorded every car for a two-month period.
These are 100 representative readings.)
a) How many standard deviations from the mean would
a car going under the speed limit be?
b) Which would be more unusual, a car traveling 34 mph
or one going 10 mph?

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