Mathematics, 28.10.2020 16:50 Mjpboy15
Consider the population of electric usage per month for houses. The standard deviation of this population is 128 kilowatt-hours. What is the smallest sample size to provide a 90% confidence interval for the population mean with a margin of error of 30 or less
Answers: 2
is known:
, E = Margin of error , 
= Critical z-value
kilowatt-hours.
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Consider the population of electric usage per month for houses. The standard deviation of this popul...
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