In the context of time series analysis, what is the purpose of "forecast error metrics" such as Mean Absolute Error (MAE) or Mean Squared Error (MSE)?

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To evaluate the accuracy of forecasts

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To identify seasonality in the data

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To remove outliers from the data

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To determine the order of differencing

Q. In the context of time series analysis, what is the purpose of "forecast error metrics" such as Mean Absolute Error (MAE) or Mean Squared Error (MSE)?

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