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# Use the following to answer the questions below:A small university is concerned with monitoring its ...

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2 months ago
Use the following to answer the questions below:

A small university is concerned with monitoring its electricity usage in its Student Center. Specifically, its officials want to know if the amount of electricity used differs by day of the week. They collected data for nearly a year, and the relevant summary statistics are provided. Note that electricity usage is measured in kilowatt hours.

 Day of Week n ​ s Sunday 45 86.48 34.89 Monday 45 109.29 27.37 Tuesday 45 110.96 28.64 Wednesday 44 115.03 31.68 Thursday 44 114.97 33.26 Friday 45 108.58 32.22 Saturday 45 87.07 38.56 ​ 313 104.56 34.25

Use the data and ANOVA results to construct a 95% confidence interval for the difference in mean electricity use between Saturdays and Sundays. Round the margin of error to two decimal places. Does your interval suggest a significant difference in mean electricity use for these two days?

▸ -12.92 to 14.10
There is strong evidence that electricity use differs significantly on Saturdays and Sundays.

▸ -11.09  to 12/27
There is strong evidence that electricity use differs significantly on Saturdays and Sundays.

▸ -12.92 to 14.10
There is no evidence that electricity use differs significantly on Saturdays and Sundays.

▸ -11.09  to 12.27
There is no evidence that electricity use differs significantly on Saturdays and Sundays.
Textbook

## Statistics: Unlocking the Power of Data

Edition: 3rd
Authors:
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latoya86latoya86
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