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Lucy is monitoring the accuracy of a forecasting model. She is comparing annual sales values of last 5 years in term of actual values and

Lucy is monitoring the accuracy of a forecasting model. She is comparing annual sales values of last 5 years in term of actual values and forecast values. She finds the tracking signals for last 5 years are calculated as: 2.5, 3.8, 5.8, 5.9 and 9.5. What should she do with the forecasting model?

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