In an effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off when no movement is present in a room. Historically, the cost of lighting an average classroom for 1 week has been $265. To determine whether the changes have signficantly reduced costs, the university takes a sample of 50 classrooms. They find that the average cost for 1 week is $247 with a standard deviation of $60. Therefore, the test statistic is 2.12. If the critical value is 1.96, what is your conclusion concerning the null hypothesis? Reject the null hypothesis Fail to reject the null hypothesis

Name: In an effort to reduce energy costs, a major university has installed
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Description: In an effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off when no movement is present in a room. Historically, the cost of lighting an average classroom for 1 wee

Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

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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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In an effort to reduce energy costs, a major university has installed more efficient lights as well as automatic sensors that turn the lights off when no movement is present in a room. Historically, the cost of lighting an average classroom for 1 week has been $265. To determine whether the changes have signficantly reduced costs, the university takes a sample of 50 classrooms. They find that the average cost for 1 week is $247 with a standard deviation of $60. Therefore, the test statistic is 2.12. If the critical value is 1.96, what is your conclusion concerning the null hypothesis?

Reject the null hypothesis

Fail to reject the null hypothesis

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