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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 costs, the university takes a sample 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 has decreased from the past, the null and alternative hypothesis would be which of the following

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 costs, the university takes a sample 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 has decreased from the past, the null and alternative hypothesis would be which of the following

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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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 costs, the university takes a sample 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 has decreased from the past, the null and alternative hypothesis would be which of the following?
ctures: from my t class 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. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past, the null and altermative hypotheses would be which of the following? O H : = 265, H:# 265 Ο Η, μ 265, Ημ: μ > 265 O HoiH2 265,H,itl<265 O Ho:p2 265, H,ip<265 O H, :ps 265, Hp> 265 O H, :p= 265, H:p# 265 O H,:p = 265, H, : + 265 O H.:P2 265,H,:p < 265 urces O Ho:pS265,H,:p > 265 O Ho:X s 247, HX >247 O Ho:X 2 247, H:8 < 247 O Ho:X= 247,HAi8#247 ort cies a and Res.
Transcribed Image Text:ctures: from my t class 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. When testing the hypothesis (at the 5% level of significance) that the average energy use has decreased from the past, the null and altermative hypotheses would be which of the following? O H : = 265, H:# 265 Ο Η, μ 265, Ημ: μ > 265 O HoiH2 265,H,itl<265 O Ho:p2 265, H,ip<265 O H, :ps 265, Hp> 265 O H, :p= 265, H:p# 265 O H,:p = 265, H, : + 265 O H.:P2 265,H,:p < 265 urces O Ho:pS265,H,:p > 265 O Ho:X s 247, HX >247 O Ho:X 2 247, H:8 < 247 O Ho:X= 247,HAi8#247 ort cies a and Res.
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