solution
Refer to Problem 4.21. Complete the trendadjusted exponential-smoothing forecast computations for periods 7, 8, and 9. Confirm that your numbers for tt , and t match those in Table 4.2. Problem 4.21 Refer to the trend-adjusted exponential smoothing illustration in Example 7. Using  = .2 and  = .4, we forecast sales for 9 months, showing […]