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Construct and explain a 95 confidence interval estimate of

A restaurant wants to estimate the average charge per couple for dinner. A random sample of 40 couples is selected and the sample mean amount is $78.25. Assume that the population standard deviation amount is $22.50. Construct and explain a 95% confidence interval estimate of the population mean amount spent per couple for dinner.

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Basic Statistics: Construct and explain a 95 confidence interval estimate of

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