GB 513 Course Great Wisdom / tutorialrank.com GB 513 Course Great Wisdom / tutorialrank.com | Page 15

year by 6, the previous year by 4, the year before that by 2,
and the other years by 1.
3. Compute the errors of the forecasts in parts (a) and (b) and
then the MAD. Which forecast is better?
1. 1 2,512.7
2. 2 2,739.2
3. 3 2,874.9
4. 4 2,934.1
5. 5 2,865.7
6. 6 2,978.5
7. 7 3,092.4
8. 8 3,356.8
9. 9 3,607.6
10. 10 3,749.3
11. 11 3,952.0
12. 12 3,949.0
13. 13 4,137.0
Question 3