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 to compute a confidence interval for the population mean Explain (b) Find a 95 confidence interval for (c) Explain the meaning of the confidence interval you computed...

a Yes The sample size is large enough for the sample mean to have ...

A random sample of size 81 has sample mean 20 and sample standard deviation 3. (a) Is

Question:

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.
Distribution
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