KW — Historical-mean baseline
Historical-mean baseline. A constant predictor that always outputs the dataset’s mean story point (≈4.04 SP); its MAE (2.03 SP) is the comparator in the H2 test — the constant value is not itself a MAE.
Source: PUMA project documentation + raw benchmark results · Traceability: ANXAG-007,ANXAG-008,ANXAG-009 · Confidence: verified-at-primary-source