A random sample of records of electricity usage of homes in the month of July gi

Question

A random sample of records of electricity usage of homes in the month of July gives the amount of electricity used and size (in square feet) of 135 homes. A simple linear regression was performed to predict the amount of electricity used (in kilowatt-hours) based on size. The resulting model is usage = 1229 + 0 02size. The residual for a family living in a house that is 2290 square foot is negative. Interpret. Their house is smaller than predicted by the regression equation They are using less electricity than predicted by the regression equation. They are using more electricity than predicted by the regression equation. Their house is bigger than predicted by the regression equation. They are using loss electricity than other houses of the same sue based on the regression equation.

Explanation / Answer

A simple linear regression was performed to predict the amount of electricity used(in kilowatt-hours) based on size.

The resulting model is usage=1229+0.02*size.

the residual for a family living in a house that is 2290 square feet is negative.

They are using less electricity than predicted the regression equation.

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