Suppose that a random sample of 10 adult U.S. males has a mean height of 69 inches with a standard deviation of 2.5 inches. If we assume that the heights of adult males in the U.S. are normally distributed, find a 95% confidence interval for the mean height of all U.S. males. Give the lower limit and upper limit of the 95% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: I Upper limit:

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