F1-Score
The balance between Precision and Recall
Remember: "Harmonic mean" — if either precision or recall is low, F1 punishes you
\[
F1 = 2 \cdot \frac{Precision \cdot Recall}{Precision + Recall}
\]
The balance between Precision and Recall
Remember: "Harmonic mean" — if either precision or recall is low, F1 punishes you