Classification metrics from counts

Problem

A classifier has $\mathrm{TP}=30$ , $\mathrm{FP}=10$ , $\mathrm{FN}=20$ , and $\mathrm{TN}=40$ . Compute accuracy, precision, recall, and $F_1$ .

Reveal answer or reference solution

Accuracy is $0.70$ , precision is $0.75$ , recall is $0.60$ , and

$F_1=\frac{2(0.75)(0.60)}{0.75+0.60}=\frac{2}{3}.$

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Appears in

Classification Practice