FA-99977 / Evaluation metric aggregation / Member archive
Balanced accuracy uses ordinary accuracy · case 02
Balanced accuracy uses ordinary accuracy.
Case contract
Return the unweighted mean recall for labels 0 and 1; an absent class has recall 0.
Why this case matters
A small explicit evaluation contract makes aggregation behavior reproducible across labeled examples.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| rare class | 0.6666666666666666 | 0.5 | Failed |
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