A Random Sample of Records of Electricity Usage of Homes

question 40

Multiple Choice

A random sample of records of electricity usage of homes gives the amount of electricity used and size (in square feet) of 135 homes.A regression to predict the amount of electricity used (in kilowatt-hours) from size has an R-squared of 71.3%.The residuals plot indicated that a linear model is appropriate.Write a sentence summarizing what
Says about this regression.

• A)Size differences explain 28.7% of the variation in electricity usage.
• B)Differences in electricity usage explain 71.3% of the variation in the size of house.
• C)Size differences explain 71.3% of the variation in the number of homes.
• D)Size differences explain 71.3% of the variation in electricity usage.
• E)Differences in electricity usage explain 28.7% of the variation in the number of house.

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Definitions:

Genus Homo

Refers to the category in biological classification that includes modern humans (Homo sapiens) and several extinct species closely related to humans.

Tropics

The region of the Earth centered on the equator and between the Tropic of Cancer in the north and the Tropic of Capricorn in the south, characterized by a warm climate year-round.

Adapted Through Culture

The process by which human groups adjust and change their cultural practices in response to environmental, social, or technological challenges.

Genus Homo

The biological genus to which humans belong, characterized by higher cognitive and social abilities compared to other primates.