Basic Computation Confidence Interval
Suppose x has a mound-shaped distribution with σ = 9. A random sample of size 36 has sample mean 20.
(a) Check Requirements Is it appropriate to use a normal distribution to compute a confidence interval for the population mean μ? Explain.
(b) Find a 95% confidence interval for μ.
(c) Interpretation Explain the meaning of the confidence interval you computed.