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Use the following to answer the questions below:A small university is trying to monitor its ...

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Use the following to answer the questions below:

A small university is trying to monitor its electricity usage. For a random sample of 30 weekend days (Saturdays and Sundays), the student center used an average of 94.26 kilowatt hours (kWh) with standard deviation 43.29. For a random sample of 60 weekdays, (Monday - Friday), the student center used an average of 112.63 kWh with standard deviation 32.07.

Construct a 95% confidence interval for the difference in mean electricity use at the student center between weekdays and weekend days. Use two decimal places in your margin of error.

▸ -3.38 to 40.51 kWh

▸ 0.12 to 36.62 kWh

▸ -6.80 to 43.54 kWh

▸ -4.61 to 41.35 kWh
Textbook

Statistics: Unlocking the Power of Data

Edition: 3rd
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olsondiolsondi
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