Essay
In order to estimate the average electric usage per month, a sample of 256 houses was selected and their electric usage was determined.Assume a population standard deviation of 500 kilowatt-hours.
a.
Determine the standard error of the mean.
b.
With a .95 probability, determine the margin of error.
c.
If the sample mean is 2500 kWh, what is the 95% confidence interval estimate of the population mean?
Correct Answer:
Verified
a.
31.25...View Answer
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Correct Answer:
Verified
a.
31.25...
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
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