precision and recall

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Note

Precision

• High fraction of TP within what the model labels as positive class: $\frac{TP}{TP+FP}$
• *bank wants to give a loan ONLY to those who certainly will return it, even if this number is small and excludes some people who also will return the money *

Recall

• Powerful “coverage” of the positive class: $\frac{TP}{TP+FN}$
• same as true positive rate
• bank wants to find all clients who will return the loan, indifferent to those who won’t be able to return it

Resources

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