Demand for a newly introduced toy is as following: Period At
Period At
1 557
2 546
3 566
4 562
5 582
6 566
7 565
8 579
9 589
10 608
11 580
12 603
Using trend projection (simple regression), forecast for period 13 through 15. (Using the trend projection equation, forecast for period 1 through 12, and calculate MAD