Question: A random sample of size 81 has sample mean 20 and sample standard deviation 3. (a) Is it appropriate to use a Students t distribution

A random sample of size 81 has sample mean 20 and sample standard deviation 3.
(a) Is it appropriate to use a Student’s t to compute a confidence interval for the population mean μ? Explain.
(b) Find a 95% confidence interval for μ.
(c) Explain the meaning of the confidence interval you computed.

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