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Formula reference
- Precision = TP ÷ (TP + FP)
- Recall = TP ÷ (TP + FN)
- Specificity = TN ÷ (TN + FP)
- F1 = 2 × Precision × Recall ÷ (Precision + Recall)
- False-positive rate = FP ÷ (FP + TN)
- Expected cost = outcome count × outcome cost
Fraud glossary
Account takeover: Unauthorized control of a genuine account.
Velocity: Event count or value within a time window.
False positive: Legitimate activity incorrectly flagged as fraud.
Model drift: A change in data or predictive relationships over time.