In an effort to reduce energy costs, a major university ... Question In an effor

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In an effort to reduce energy costs, a major university ... Question 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 p-value is 0.017. When testing the hyposthesis (at the 5% level of significance) that the average energy use has decreased from the past what is your conclusion concerning the null hyposthesis?

Explanation / Answer

that the average energy use has not decreased from the past at 5% level of significance.

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In an effort to reduce energy costs, a major university has installed more effic

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