Almost everyone who regularly drives his or her car in a large North American City agrees that traffic is getting worse. A randomly selected sample of 100 cars had their speeds measured on a freeway during rush hour. The sample mean is 17.2 mph (miles per hour). Traffic engineers determined that two years ago the mean and standard deviation of speeds on the same freeway during rush hour were 18.6 and 6.2 mph, respectively. Q6. Find the p-value of the test to determine how much evidence exists to support the generally held belief that traffic is getting worse. (Assume that the standard deviation of speeds today is unchanged from that of two years ago)
Almost everyone who regularly drives his or her car in a large North American City agrees that traffic is getting worse. A randomly selected sample of 100 cars had their speeds measured on a freeway during rush hour. The sample mean is 17.2 mph (miles per hour). Traffic engineers determined that two years ago the mean and standard deviation of speeds on the same freeway during rush hour were 18.6 and 6.2 mph, respectively. Q6. Find the p-value of the test to determine how much evidence exists to support the generally held belief that traffic is getting worse. (Assume that the standard deviation of speeds today is unchanged from that of two years ago)
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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Transcribed Image Text:Almost everyone who regularly drives his or her car in a large
North American City agrees that traffic is getting worse.
A randomly selected sample of 100 cars had their speeds
measured on a freeway during rush hour. The sample mean is 17.2 mph (miles per hour).
Traffic engineers determined that two years ago the mean and standard deviation
of speeds on the same freeway during rush hour were 18.6 and 6.2 mph, respectively.
Q6. Find the p-value of the test to determine how much evidence exists to support
the generally held belief that traffic is getting worse.
(Assume that the standard deviation of speeds today is unchanged
from that of two years ago)
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