A before-and-after speed study was conducted to determine the effectiveness of a series of rumble strips installed approaching a toll plaza to reduce approach speeds to 40 mi/h. The tablebelow shows summarizes the results of the study.ItemAverageSpeedStandardDeviationSample SizeO TrueBeforeStudy43.5 mi/hⒸ False4.8 mi/h120AfterStudy40.8 mi/h5.3 mi/hAnswer the following True/False question after performing statistical analysis on the data (be sure to upload the statistical analysis solution to support your answer).The rumble strips effective in reducing average speeds to 40 mi/h. (True or False)?108

To determine whether the rumble strips were effective, we need to compare the average speed before…

A before-and-after speed study was conducted to determine the effectiveness of a series of rumble strips installed approaching a toll plaza to reduce approach speeds to 40 mi/h. The table below shows summarizes the results of the study. Item Average Speed Standard Deviation Sample Size O True Before Study 43.5 mi/h ● False 4.8 mi/h 120 After Study 40.8 mi/h 5.3 mi/h Answer the following True/False question after performing statistical analysis on the data (be sure to upload the statistical analysis solution to support your answer). The rumble strips effective in reducing average speeds to 40 mi/h. (True or False)? 108

A before-and-after speed study was conducted to determine the effectiveness of a series of rumble strips installed approaching a toll plaza to reduce approach speeds to 40 mi/h. The table below shows summarizes the results of the study. Item Average Speed Standard Deviation Sample Size O True Before Study 43.5 mi/h ● False 4.8 mi/h 120 After Study 40.8 mi/h 5.3 mi/h Answer the following True/False question after performing statistical analysis on the data (be sure to upload the statistical analysis solution to support your answer). The rumble strips effective in reducing average speeds to 40 mi/h. (True or False)? 108

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter4: Traffic Engineering Studies

Section: Chapter Questions

Problem 3P

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