1. Data collected on the yearly registration for a Six Sigma seminar at the Quality College are shown in the following table:

Year	Registrations (000)
1	4
2	6
3	4
4	5
5	10
6	8
7	7
8	9
9	12
10	14
11	15

1. Develop a 4-year moving average to forecast registrations from year 5 to year 12.
2. Estimate demand again for years 5 to 12 within a 4-year weighted moving average in which registrations in the most recent year are given a weight of 3 and 2, and registrations in the other 2 years are each given a weight of 1.
3. Compute the forecasts for each year using exponential smoothing, with an initial forecast for year 5 of 8. Use = 0.3.
4. Using MAD, which of the three forecasting methods is best?
5. Using MAPE, which of the three forecasting methods is best?
6. Forecast registrations for year 15, using trend projection.