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In Order to Estimate the Average Electric Usage Per Month

question 89

Multiple Choice

In order to estimate the average electric usage per month, a sample of 64 houses was selected and the electric usage was determined. Assume a population standard deviation of 320 kilowatt-hours. If the sample mean is 1858 kWh, the 95% confidence interval estimate of the population mean is _____ kWh.


Definitions:

Corpus Callosum

A large band of neural fibers connecting the two hemispheres of the brain and facilitating interhemispheric communication.

Gyri

The raised folds or convolutions in the cerebral cortex that increase the brain's surface area and cognitive ability.

Convolutions

The ridges of brain matter between the sulci; also called gyri.

Respiration

The biochemical process in living organisms involving the exchange of gases (oxygen and carbon dioxide) to produce energy.

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