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A sample of 260 observations is selected from a normal population with a population standard deviation of 27. The sample mean is 17. a. Determine

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A sample of 260 observations is selected from a normal population with a population standard deviation of 27. The sample mean is 17. a. Determine the standard error of the mean. (Round your answer to 3 decimal places.) Standard error of the mean K nces b. Determine the 90% confidence interval for the population mean. (Round your answers to 3 decimal places.) Confidence interval and

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