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arXiv 1607.05136math.STmath.PRstat.TH
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通过中位偏差校正的似然置信度分布

Confidence distributions from likelihoods by median bias correction

Pierpaolo De Blasi, Tore Schweder

摘要:

利用改进的有向似然法,从似然中得到标量参数的高阶精度置信限。它们可以方便地用置信度分布来描述,置信度分布是参数空间上的样本相关分布函数。在本文中,我们探索了一种不同的路线,准确的置信限,通过尾部对称的置信曲线,即曲线,描述在任何水平的等尾区间。而不是修改的直接似然,我们考虑反转的对数似然比时,在中位数的最大似然估计。这表明,提供相等的尾区间,从而一个确切的置信度分布,在定期一维模型的近似三阶。中位数偏差校正也提供了一个替代近似的修改后的有向似然指数家庭举行了二阶。

英文摘要:

By the modified directed likelihood, higher order accurate confidence limits for a scalar parameter are obtained from the likelihood. They are conveniently described in terms of a confidence distribution, that is a sample dependent distribution function on the parameter space. In this paper we explore a different route to accurate confidence limits via tail-symmetric confidence curves, that is curves that describe equal tailed intervals at any level. Instead of modifying the directed likelihood, we consider inversion of the log-likelihood ratio when evaluated at the median of the maximum likelihood estimator. This is shown to provide equal tailed intervals, and thus an exact confidence distribution, to the third-order of approximation in regular one-dimensional models. Median bias correction also provides an alternative approximation to the modified directed likelihood which holds up to the second order in exponential families.

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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