Demand for a newly introduced toy is as following:
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. Based on your analysis of MAD, what conclusion would you draw for forecasts 13 through 15?