1) Theactualvaluesfor12periods(showninorder)are:

(1)45(2)52(3)48(4)59(5)55(6)54(7)64(8)59(9)72(10)66(11)64(12)78

Using a 5 period simple moving average, the forecast for period 13 will be:

2) Using the 4 period weighted moving average, the forecast for period 13 will be:

3) With exponential smoothing, the forecast for period 13 will be:

4) With linear regression, the forecast for period 13 will be:

5) With quadratic regression, the forecast for period 13 will be:

6) Considering only the forecasts for period 6-12, what is the lowest MAD value for any of the methods?