stats

\[accuracy = \frac{TP+TN}{TP + TN + FP + FN}\] \[Positive \ Predictive \ Value \ (PPV) = \frac{TP}{TP+FP}\] \[sensitivity = \frac{TP}{FP+FN}\] \[specificity = \frac{TN}{TN+FP}\] \[F_1 = 2 \cdot \frac{PPV \cdot sensitivity}{PPV + sensitivity}\]