Two separate surveys were carried out to investigate whether the users of East Coast Expressway are in favor of raising the speed limit on highways. From 250 car drivers interviewed, 30 were not in favor of raising the speed limit. While among 200 motorcyclists interviewed, 20 were not in favor of raising the speed limit. Find a 93% confidence interval for the difference of population proportion between the car drivers and motorcyclists who are in favor of raising the speed limit. Interpret the interval.
Two separate surveys were carried out to investigate whether the users of East Coast Expressway are in favor of raising the speed limit on highways. From 250 car drivers interviewed, 30 were not in favor of raising the speed limit. While among 200 motorcyclists interviewed, 20 were not in favor of raising the speed limit. Find a 93% confidence interval for the difference of population proportion between the car drivers and motorcyclists who are in favor of raising the speed limit. Interpret the interval.
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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Two separate surveys were carried out to investigate whether the users of East Coast Expressway
are in favor of raising the speed limit on highways. From 250 car drivers interviewed, 30 were not
in favor of raising the speed limit. While among 200 motorcyclists interviewed, 20 were not in
favor of raising the speed limit. Find a 93% confidence interval for the difference of population
proportion between the car drivers and motorcyclists who are in favor of raising the speed limit.
Interpret the interval.
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