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arXiv 1101.3333math.STstat.TH
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风险的单调性检验:渐近分布理论

Testing monotonicity of a hazard: asymptotic distribution theory

Piet Groeneboom, Geurt Jongbloed

摘要:

引入两个新的检验统计量来检验抽样分布在指定区间[0,a]上具有递增危险率的原假设。这些统计量是保序估计之间的经验L_1型距离,它使用单调性约束,以及经验分布函数或经验累积风险。由于局部非单调性,它们测量经验估计相对于保序估计的偏移。如果风险在[0,a]上严格增加,则在温和条件下建立检验统计量的渐近正态性。这是通过首先用相对于基础分布函数的距离来近似全局经验距离来完成的。由此产生的积分被视为越来越多的局部积分,其中CLT可以应用的总和。局部积分的行为由一个规范过程决定:随机过程x -> W(x)+x^2(其中W是标准的双侧布朗运动)与其最大凸次量之间的差。

英文摘要:

Two new test statistics are introduced to test the null hypotheses that the sampling distribution has an increasing hazard rate on a specified interval [0,a]. These statistics are empirical L_1-type distances between the isotonic estimates, which use the monotonicity constraint, and either the empirical distribution function or the empirical cumulative hazard. They measure the excursions of the empirical estimates with respect to the isotonic estimates, due to local non-monotonicity. Asymptotic normality of the test statistics, if the hazard is strictly increasing on [0,a], is established under mild conditions. This is done by first approximating the global empirical distance by an distance with respect to the underlying distribution function. The resulting integral is treated as sum of increasingly many local integrals to which a CLT can be applied. The behavior of the local integrals is determined by a canonical process: the difference between the stochastic process x -> W(x)+x^2 where W is standard two-sided Brownian Motion, and its greatest convex minorant.

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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