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ISTQB Certified Tester: AI Testing (CT-AI) · ISTQB
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- Precision = TP / (TP + FP) — of all items the model predicted as positive, what fraction were actually positive. TP / (TP + FN) is recall (sensitivity). (TP + TN) / total is accuracy. The fourth formula is the F1 score (harmonic mean of precision and recall).