SOLUTION SOLVED PROBLEM 4.4 The following data come from regression line projections: Actual - Forecast MAD RI PERIOD 2 3 4 FORECAST VALUES 410 419 428 435 ACTUAL VALUES 406 423 423 440 Compute the MAD and MSE. MSE = 406 - 410] + [423-419+ [423 - 428+1440 - 435 4 4 + 4 + 5 + 5 18 4.5 4 4 (Forecast errors) n (406-410)2+(423-419)2+(423-428)2+(440-435) 4 + 4 + 52 + 52 16 + 16 + 25 + 25 = 20.5 4 4