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Consider a normal population with an unknown population standard deviation. A random sample results in x−...

Consider a normal population with an unknown population standard deviation. A random sample results in x− = 50.36 and s2 = 31.36. [You may find it useful to reference the t table.]

a. Compute the 99% confidence interval for μ if x− and s2 were obtained from a sample of 16 observations. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.)

b. Compute the 99% confidence interval for μ if x− and s2 were obtained from a sample of 24 observations. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.)

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