Unverified50% confidenceSolutionExact time
在二分类中模型默认使用0.5作为判定阈值，但假阳性和假阴性的代价往往不对等，需通过成本敏感的阈值优化调整决策边界
1
Sources
50%
Confidence
Long-term
Relevance
8/28/2026
First Seen
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UnverifiedIn logistic regression, a predicted probability greater than 0.5 is classified as a positive example and less than 0.5 as a negative example, but this 0.5 threshold can be adjusted according to business requirements.76% similarUnverified评估基准测试质量的关键指标是假阳性率和假阴性率，理想基准应将两者控制在较低水平70% similarUnverified最优阈值可通过最大化Youden指数（灵敏度+特异度-1）确定，在假阳性与假阴性代价对等时是最优阈值选择准则70% similarUnverifiedSingle-period data, lack of horizontal comparison, and differences in reporting standards mean that the 51% zero-payout data should be treated as a signal worth further investigation rather than a definitive judgment of the company.69% similar
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