PN — H2 (estimation): the null states no example-enriched configuration beats…
H2 (estimation): the null states no example-enriched configuration beats the historical-mean baseline MAE; the alternative requires a statistically significant MAE reduction of at least 0.5 story points (Wilcoxon two-sided, alpha=0.05).
Source: PUMA project documentation · Traceability: corpus unit
MEM-018· Confidence: verified-at-primary-source