Fundamentals of Statistics Plus MyLab Statistics with Pearson eText - Title-Specific Access Card Package (5th Edition)

5th Edition

ISBN: 9780134763729

Author: Michael Sullivan III

Publisher: PEARSON

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Textbook Question

Chapter 11.3, Problem 13AYU

NW Ramp Metering Ramp metering is a traffic engineering idea that requires cars entering a freeway to stop for a certain period of time before joining the traffic flow. The theory is that ramp metering controls the number of cars on the freeway and the number of cars accessing the freeway, resulting in a freer flow of cars, which ultimately results in faster travel times. To test whether ramp metering is effective in reducing travel times, engineers in Minneapolis, Minnesota, conducted an experiment in which a section of freeway had ramp meters installed on the on-ramps. The response variable for the study was speed of the vehicles. A random sample of 15 cars on the highway for a Monday at 6 P.M. with the ramp meters on and a second random sample of 15 cars on a different Monday at 6 P.M. with the meters off resulted in the following speeds (in miles per hour).

Chapter 11.3, Problem 13AYU, NW Ramp Metering Ramp metering is a traffic engineering idea that requires cars entering a freeway

a. Draw side-by-side boxplots of each data set. Does there appear to be a difference in the speeds? Are there any outliers?
b. Are the ramp meters effective in maintaining a higher speed on the freeway? Use the α = 0.10 level of significance.

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Chapter 11.3, Problem 12AYU

Chapter 11.3, Problem 14AYU

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Chapter 11 Solutions

Fundamentals of Statistics Plus MyLab Statistics with Pearson eText - Title-Specific Access Card Package (5th Edition)

Ch. 11.1 - A sampling method is _____ when the individuals...Ch. 11.1 - A sampling method is _____ when the individuals...Ch. 11.1 - In Problems 38, determine whether the sampling is...Ch. 11.1 - In Problems 38, determine whether the sampling is...Ch. 11.1 - In Problems 38, determine whether the sampling is...Ch. 11.1 - In Problems 38, determine whether the sampling is...Ch. 11.1 - In Problems 38, determine whether the sampling is...Ch. 11.1 - Prob. 8AYU Ch. 11.1 - In Problems 912, conduct each test at the = 0.05...Ch. 11.1 - In Problems 912, conduct each test at the = 0.05...

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Solution Summary: The author concludes that there is sufficient evidence to support the claim that the ramp meters effective in maintaining a higher speed on the freeway.

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