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Homework answers / question archive / A local restaurant has recorded the demand for bottled water in each of the last 15 months of business
A local restaurant has recorded the demand for bottled water in each of the last 15 months of business. Use the recorded demand data below to develop three-period and four-period moving-average forecasts for bottles of water.
| Period | Demand | Period | Demand | Period | Demand |
| 1 | 925 | 6 | 890 | 11 | 870 |
| 2 | 910 | 7 | 960 | 12 | 860 |
| 3 | 905 | 8 | 895 | 13 | 900 |
| 4 | 850 | 9 | 910 | 14 | 920 |
| 5 | 860 | 10 | 905 | 15 | 950 |
(Weights are t = 0.3, t-1 = 0.2, t-2 = 0.3 and t-3 = 0.2)
What is the MAPE for the three-period weighted moving average forecast as of period 15?
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