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2. (20 Points) In order to estimate the average electric usage per month, a sample of 256 ( ) houses was selected, and their electric

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2. (20 Points) In order to estimate the average electric usage per month, a sample of 256 ( ) houses was selected, and their electric usage determined. 350 C. If the sample mean is 2,000 KWH, what is the 97% confidence interval estimate of the population mean? on b

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