Answered: 6.82 Drivers’ Test in Small Towns…

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

6.82 Drivers’ Test in Small Towns Toronto drivers have been
going to small towns in Ontario (Canada) to take the drivers’ road
test, rather than taking the test in Toronto, because the pass rate in
the small towns is 90%, which is much higher than the pass rate in
Toronto. Suppose that every day, 100 people independently take the
test in one of these small towns.
a. What is the number of people who are expected to pass?
b. What is the standard deviation for the number expected to pass?
c. After a great many days, according to the Empirical Rule, on about
95% of these days the number of people passing the test will be as low
as _______ and as high as _______.
d. If you found that on one day, 89 out of 100 passed the test, would you
consider this to be a very high number?

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