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:

Terminal Buttons

Terminal buttons are the small nodules at the end of axons that release chemical neurotransmitters, which facilitate the transmission of signals from one neuron to another.

Axons

Long, threadlike parts of a nerve cell along which impulses are conducted from the cell body to other cells.

Dendrites

Branch-like extensions of neurons that receive signals from other neurons and transmit them toward the cell body.

Synaptic Cleft

The small gap between neurons at a synapse, through which neurotransmitters are released to transmit signals to adjacent neurons.