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

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A month 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

Computer output provides the following grouping information:

 Day of Week N Mean Grouping Wed 44 115.03 A Thurs 44 114.97 A Tues 45 110.96 A Mon 45 109.29 A Fri 45 108.58 A Sat 45 87.07 B Sun 45 86.48 B
Means that do not share a letter are significantly different.

Use the output to make a statement about how electricity usage differs significantly by day of the week.

▸ Significantly less electricity is used on weekends than on weekdays.

▸ There is not enough evidence to conclude that electricity usage on weekends is different than electricity usage on weekdays.
Textbook

## Statistics: Unlocking the Power of Data

Edition: 3rd
Authors:
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someonespecialsomeonespecial
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