Rolling-Origin Evaluation & Forecast Uncertainty – Practice Quiz

Evaluate operational forecasts with rolling origins, horizon-specific errors, scaled losses and interval calibration. Diagnose temporal leakage, residual structure and changes in demand; assess coherent forecasts across aggregation levels. Prerequisites: time-series models and predictive validation. Original single-select and multiselect scenarios progress from interpretation to worked applications and assumption-sensitive challenges. Detailed solutions explain the alternatives; this is educational statistical practice.