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arXiv 1906.08296stat.ME
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受试者工作特征曲线下面积的无模型后验推断

Model-free posterior inference on the area under the receiver operating characteristic curve

Zhe Wang, Ryan Martin

摘要:

受试者工作特征曲线(AUC)下的面积作为二元分类器性能的总结。用于估计AUC的方法已经在限制分类器产生的分数的分布的二正态性假设下开发。然而,这种假设引入了无限维的讨厌参数,并且可能是不合适的,特别是在机器学习的上下文中。这促使我们采用模型自由吉布斯后验分布的AUC。我们提出了渐近吉布斯后验集中率,并调整学习率,使相应的可信区间达到标称频率覆盖概率的策略。仿真实验和实际数据分析表明,吉布斯后验的强大性能相比,现有的方法的基础上的秩似然。

英文摘要:

The area under the receiver operating characteristic curve (AUC) serves as a summary of a binary classifier's performance. Methods for estimating the AUC have been developed under a binormality assumption which restricts the distribution of the score produced by the classifier. However, this assumption introduces an infinite-dimensional nuisance parameter and can be inappropriate, especially in the context of machine learning. This motivates us to adopt a model-free Gibbs posterior distribution for the AUC. We present the asymptotic Gibbs posterior concentration rate, and a strategy for tuning the learning rate so that the corresponding credible intervals achieve the nominal frequentist coverage probability. Simulation experiments and a real data analysis demonstrate the Gibbs posterior's strong performance compared to existing methods based on a rank likelihood.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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