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A city planner is researching why traffic speeds appear to be slower throughout the city. She checks 51 speed measurement devices located around the city and computes a sample mean of 20.6 mph. The historical mean speed for the city is approximately normal with u = 21.9 mph and a = 8.9 mph. Conduct a test of significance stating Ho and H₂ and report the P-value. State your conclusion setting a = 0.05.

A city planner is researching why traffic speeds appear to be slower throughout the city. She checks 51 speed measurement devices located around the city and computes a sample mean of 20.6 mph. The historical mean speed for the city is approximately normal with u = 21.9 mph and a = 8.9 mph. Conduct a test of significance stating Ho and H₂ and report the P-value. State your conclusion setting a = 0.05.

MATLAB: An Introduction with Applications
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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A city planner is researching why traffic speeds appear to be slower throughout the city. She checks 51 speed measurement devices located around the city and computes a sample mean of 20.6 mph. The historical mean speed for the city is approximately normal with μ = 21.9 mph and a = 8.9 mph. Conduct a test of significance stating Ho and H₂ and report the P-value. State your conclusion setting a = 0.05.
Transcribed Image Text:A city planner is researching why traffic speeds appear to be slower throughout the city. She checks 51 speed measurement devices located around the city and computes a sample mean of 20.6 mph. The historical mean speed for the city is approximately normal with μ = 21.9 mph and a = 8.9 mph. Conduct a test of significance stating Ho and H₂ and report the P-value. State your conclusion setting a = 0.05.
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