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Forecasting & Time Series

Building and validating forecasts from time-ordered data: trend, seasonality, backtesting, and recognising when a model has quietly stopped working.

Forecast Accuracy Metrics: MAE, RMSE, MAPE and When Each Misleads

Compare MAE, RMSE, MAPE, and MASE for forecast accuracy, see each metric's real failure modes, and learn to backtest with rolling-origin cross-validation.

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