don't copy Chegg otherwise, I'll report you!!

4. A firm sells home security systems online. Customers place their orders through firm's web- site and receive the system in 3 days. These systems can be easily installed by home owners. Total number of systems sold in the last 12 weeks were 810, 991, 1067, 942, 977, 729, 1052, 941, 804, 847, 754, and 915. 1. Use exponential smoothing method to develop point and 95-percent prediction interval forecasts for the sales of home security systems in the next month. Use MSE as your evaluation criterion. b. The firm has a total of 800 systems in its inventory next month. What is the chance that the firm will have shortage of systems to satisfy next month's demand