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A random sample of 89 observations produced a mean x = 25.4 and a standard deviation s = 2.5. a. Find a 95% confidence interval

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A random sample of 89 observations produced a mean x = 25.4 and a standard deviation s = 2.5. a. Find a 95% confidence interval for u. b. Find a 90% confidence interval for u. c. Find a 99% confidence interval for u. a. The 95% confidence interval is (Use integers or decimals for any numbers in the expression. Round to two decimal places as needed.)

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