In an effort to reduce energy costs, a major university has installed more efficient lights as well
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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 week has been $ To determine whether the changes have significantly reduced costs, the university takes a sample of classrooms. They find that the average cost for week is $ with a standard deviation of $ When testing the hypothesis at the level of significance that the average energy use has decreased from the past, what is the critical value? please round your answer to decimal places
Related Book For
Understanding Business Ethics
ISBN: 9781506303239
3rd Edition
Authors: Peter A. Stanwick, Sarah D. Stanwick
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