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A-C A random sample of 87 observations produced a mean x = 25.4 and a standard deviation s = 2 4 a. Find a 95%

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A-C

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A random sample of 87 observations produced a mean x = 25.4 and a standard deviation s = 2 4 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 need

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