The director of maintenance sent out the following note to all faculty and staff:
We are once again calling your attention to energy conservation. Attached is the Kilo Watt Hour usage report per building for your reference. At the current cost per KwH the college will be paying $46,410.00 per month or $556,920.00 per year. (91,000 KwH x $.51=$46,410x per month x 12= $556,920.00). As you can see, the college needs everyone's assistance in conserving energy. Thank you for you understanding and cooperation.
The table includes the kilowatt-hours used by the south faculty building F2. For the twelve months prior to the data in the table F2 used an average of 6094.33 KwH per month (data). Use the data in the table to generate a 95% confidence interval and determine whether the south faculty building has used more energy, less energy, or the same amount of energy over the last twelve months. Use as the pre-existing, previously known population mean μ energy consumption 6094.33 KwH.
Given the following hypotheses:
Null hypothesis: H0: μ = 6094.33 KwH
Alternate hypothesis: H1: μ ≠ 6094.33 KwH