Statistical process control with means chart V. C. Abbott Inc. owns and operates twenty fast food restaurants in Chicago. Each restaurant is required to have a certain amount of cash on hand to make change and pay local vendors as well as give cash advances to employees who cannot wait for their weekly paychecks mailed from the firm's headquarters in Evanston. How- ever, management also wants to make sure that no store has excess cash sitting around. Large amounts of cash in stores attract unwanted attention from criminals. In addition, cash is an unproductive asset which can be invested overnight and earn interest. The company's manage- ment accountant. Buck I. Shaid, spent four consecutive days on the company mainframe and collected the data on the following page on each store's daily cash balance at the end of each day.

REQUIRED Computer requirements a. Compute each store's average daily cash balance over the four observation days.