Question: In order to estimate the average electric usage per month, a sample of 64houses was selected and the electric usage was determined. Assume a population

In order to estimate the average electric usage per month, a sample of 64houses was selected and the electric usage was determined. Assume a population standard deviation of 320 kilowatt-hours. At 95% confidence, the size of the margin of error is Question 29Select one: a. 1.96. b. 40.00. c. 78.40. d. 65.80

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