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A random sample of 16 is selected from a normally distributed population and provides a sample mean of 239.2 with a standard deviation of 67.8.

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A random sample of 16 is selected from a normally distributed population and provides a sample mean of 239.2 with a standard deviation of 67.8. A 90% confidence interval estimate of the population mean is 239.2 + (please provide a positive number to 2 decimal places). Check

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