TDSM 7.7

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Precision is how many of our positive guesses are true out of all examples for which we said yes.

[math]Precision = \frac{TP}{TP + FP}[/math]

Recall is how many of our positive guesses are true out of all examples which are really true.

[math]Recall = \frac{TP}{TP + FN}[/math]

Recall is the y axis of ROC Curve.