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Observation Forecast Three-Period Moving Average Forecast 100 90- C. 85- 80 Time Period 2 3 6 7 8 9 10 11 12 13 14 AfT

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Observation Forecast Three-Period Moving Average Forecast 100 90- C. 85- 80 Time Period 2 3 6 7 8 9 10 11 12 13 14 A\fT U C D G K M N 0 P Q R S A B E F H Moving Average Forecasting Use the area below to draw a line chart for the three-period moving average. Periods in moving average 3 Time Period Demand Forecast Error Error*2 Formulas 1 85 80 OUR WN 81 IN/A #N/A #N/A #N/A #N/A #N/A 10 96 1717 90 #N/A #N/A #N/A 11 12 7 88 #N/A #N/A #N/A 8 86 #N/A #N/A #N/A 9 89 #N/A #N/A #N/A 10 91 #N/A #N/A #N/A 11 87 #N/A #N/A #N/A 12 95 #N/A #NIA #N/A 18 Next period forecast: #N/A 19 20 MSE #N/A 21 Use the area below to draw a line chart for the four-period moving average. 24 Periods in moving average 4 25 Time 26 Error Error*2 Period Demand Forecast 27 1 28 29 80 30 81 31 96 #N/A #N/A #N/A 6 #N/A #N/A 32 90 #N/A 7 88 #N/A #N/A #N/A 33 1717 8 86 #N/A #N/A #N/A 34 35 9 89 #N/A #N/A #N/A 10 91 #N/A #N/A #NIA 36 11 87 #N/A #N/A #N/A 95 #N/A #NIA #N/A Next period forecast: 13 #N/A 40 41 MSE #N/A 42 43 Which moving average is best? #N/A 44 45 46\f\f

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