-A random sample of 15 checking accounts at a bank showed anaverage balance of $280. The standard deviation of the sample was$60. Construct a 90% confidence interval for the mean and explainwhat it shows you in the context of the problem. Show your work andshow your calcualtor steps.
-A local health center noted that in a sample of 400 patients 80were referred to them by the local hospital. Provide a 95%confidence interval for the percentage of patients who werereferred to the health center by the hospital and explain what itmeans in the context of the problem. Show your work and show yourcalcualtor steps.
