ACCA

Forecasting Techniques

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Section A TransGlobal Logistics uses time series analysis to forecast shipping volumes. The underlying trend is calculated using a 4-quarter centered moving average. If the actual shipping volume for Quarter 3 was 12,500 TEUs (Twenty-foot Equivalent Units) and the centered moving average trend value for that quarter was 11,800 TEUs, what is the seasonal variation for Quarter 3 using the additive model?

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