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Confidence interval estimate for the population mean

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Reference no: EM132844971

Suppose average pizza delivery times are normally distributed with an unknown population mean and a population standard deviation of six minutes. A random sample of 28 pizza delivery restaurants is taken and has a sample mean delivery time of 36 minutes.

Find a 90% confidence interval estimate for the population mean delivery time.

Solution: Fill in the blank: Round to two decimal places. (34.14, _____________ )

Reference no: EM132844971

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