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PR curve
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649.
Random Classifier PR Curve
easy
What does a random classifier's PR curve look like on a dataset with 10% positive class prevalence?
A
A vertical line at recall = 0.50 since a random classifier detects half of all positives
B
A diagonal line from (0,1) to (1,0) similar to its ROC curve appearance
C
A horizontal line at precision = 0.10, equal to the positive class prevalence
D
A curve that rises steeply then flattens, mirroring the class imbalance ratio
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