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1. The president of a large university wishes to estimate the average age of the students presently enrolled. From past studies, the standard deviation from

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1. The president of a large university wishes to estimate the average age of the students presently enrolled. From past studies, the standard deviation from the population is known to be 2 years. A sample of 50 students is selected, and the mean is found to be 23.2 years. Find the 95% confidence interval of the population mean an Xx Ze (t) = 23.2 + 1,96 2 2 2

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