Owner of a store that sells CDs wants to estimate the mean amount of time a customer remains in the store. A random sample of 34 customers was observed, and found to have a sample mean time of 12.77 minutes in the store with a sample standard deviation of 3.45 minutes.
a) Construct a 90% confidence interval for the true mean time a customer will remain in the store.
b)One sentence interpretation of choice of your confidence interval.