Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 47

Basic Computation: Confidence Interval Suppose x has a normal distribution with = 6. A random sample of size 16 has sample mean 50.
(a) Check Requirements Is it appropriate to use a normal distribution to compute a confidence interval for the population mean Explain.
(b) Find a 90% confidence interval for .
(c) Interpretation Explain the meaning of the confidence interval you computed.