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Suppose net gain in dollars of the departments for an industry per day are normally...

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Suppose net gain in dollars of the departments for an industry per day are normally distributed and have a known population standard deviation of 325 dollars and an unknown population mean A random sample of 20 departments is taken and gives a sample mean of 1640 dollars Find the confidence interval for the population mean with a 98 confidence level Round your answer to TWO decimal places ZO 10 Provide your answer below 1 282 20 05 1 645 You may use a calculator or the common z values above 20 025 1 960 20 01 2 326 Zo 005 2 576

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