Problem: A pharmacist has been monitoring sales of a certain over-the-counter pain reliever. Daily sales during the last 15 days were
Day: 1 2 3 4 5 6 7 8 9
Number sold: 36 38 42 44 48 49 50 49 52
Day: 10 11 12 13 14 15
Number sold: 48 53 55 55 56 55
a. Suppose that the data refer to demand rather than sales using trend-adjusted smoothing with the initial forecast of 51 for week 8, the initial trend estimate of 3. Make forecasts for days 9 by 16. What is MSE for the 8 forecasts for which there are actual data?