Multiple Choice
In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determined.Assume a population standard deviation of 450 kilowatt-hours.At 95% confidence, the size of the margin of error is
A) 1.96.
B) 50.00.
C) 98.00.
D) 42.00.
Correct Answer:
Verified
Correct Answer:
Verified
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