A traffic engineer conducted a study on the number of speed limit violation among Malaysian drivers. He posted a speed limit of 50 km/h and monitored the speed of 100 randomly selected vehicles and found that 27 of them violated the speed limit. The speed limit was raised to 70 km/h and he monitored the speed of 100 randomly selected vehicles and found 19 vehicles violated the speed limit. Calculate a 95% confidence interval for the difference between the two proportions of vehicles violating the speed limit, before and after the speed limit was raised. Then, based on your answer, do you think that it is likely that the two true proportions of vehicles violating the speed limit are the same? Justify your answer.

A traffic engineer conducted a study on the number of speed limit violation among Malaysian drivers. He posted a speed limit of 50 km/h and monitored the speed of 100 randomly selected vehicles and found that 27 of them violated the speed limit. The speed limit was raised to 70 km/h and he monitored the speed of 100 randomly selected vehicles and found 19 vehicles violated the speed limit. Calculate a 95% confidence interval for the difference between the two proportions of vehicles violating the speed limit, before and after the speed limit was raised. Then, based on your answer, do you think that it is likely that the two true proportions of vehicles violating the speed limit are the same? Justify your answer.

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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