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 one week has been $265. To determine whether the changes have significantly reduce cost calm the University takes a simple of 50 classrooms. They find that the average cost for one week is $247 with a standard deviation of $60. When testing the hypothesis ( at the 5% level of significance) that the average energy use that decreased from the past, what is the test statistic? **please round your answer to 2 decimal places** 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. Todetermine 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. When testing the hypothesis (at the 5% level of significance) that theaverage energy use has decreased from the past, what is the test statistic? (please round your answer to 2 decimal places)

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Answered: In an effort to reduce energy costs, a…

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 one week has been $265. To determine whether the changes have significantly reduce cost calm the University takes a simple of 50 classrooms. They find that the average cost for one week is $247 with a standard deviation of $60. When testing the hypothesis ( at the 5% level of significance) that the average energy use that decreased from the past, what is the test statistic? **please round your answer to 2 decimal places**