#precision

11 questions from Evaluation Metrics

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Question 1: Single choice

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A binary classifier reaches a recall of 100% on the test set. What can you conclude?

Its accuracy must also be 100%, as no positive is missed1
It makes no false positive predictions on the test set2
It found every positive example, though it may also flag negatives3
Its precision must be high as well, since recall is perfect4

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