Homework Answers
(a)
| Week | Forecast | Actual | Deviation | RSFE | Absolute deviation | Sum of absolute deviation | MAD | TS |
| 1 | 840 | 920 | 80 | 80 | 80 | 80 | 80 | 1.0 |
| 2 | 870 | 1,020 | 150 | 230 | 150 | 230 | 115 | 2.0 |
| 3 | 970 | 1,070 | 100 | 330 | 100 | 330 | 110 | 3.0 |
| 4 | 970 | 920 | -50 | 280 | 50 | 380 | 95 | 2.9 |
| 5 | 1,020 | 920 | -100 | 180 | 100 | 480 | 96 | 1.9 |
| 6 | 995 | 1,010 | 15 | 195 | 15 | 495 | 82.5 | 2.4 |
Calculations:
(b)
Unacceptable since the TS values are outside the limit [-2, 2].
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