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

تمرين 15

Basic Computation: Confidence Interval A random sample of size 81 has sample mean 20 and sample standard deviation 3.
(a) Check Requirements Is it appropriate to use a student's t distribution to compute a confidence interval for the population mean Explain.
(b) Find a 95% confidence interval for .
(c) Interpretation Explain the meaning of the confidence interval you computed.