arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.10640stat.ME
收藏

有限混合模型的置信阶选择

Order selection with confidence for finite mixture models

Hien D Nguyen, Daniel Fryer, Geoffrey McLachlan

摘要:

有限混料模型的混料分量数(阶数)的确定一直是统计推断中的一个难题。我们证明了封闭测试原则导致一个顺序测试程序(STP),允许的信心声明,以有限混合模型的顺序。我们构造有限样本测试,通过数据分割和数据交换,在STP中使用,我们证明,这样的测试是一致的固定的替代品。模拟研究和真实数据的例子来证明有限样本测试为基础的STP的性能,产生实际的建议,他们使用的置信估计结合点估计,如赤池信息或贝叶斯信息标准。此外,我们证明了修改的STP产生的方法,始终选择有限混合模型的顺序,在渐近意义上。我们的STP不仅适用于有限混合模型的阶选择,而且对于任何嵌套模型序列的置信声明也是有用的。

英文摘要:

The determination of the number of mixture components (the order) of a finite mixture model has been an enduring problem in statistical inference. We prove that the closed testing principle leads to a sequential testing procedure (STP) that allows for confidence statements to be made regarding the order of a finite mixture model. We construct finite sample tests, via data splitting and data swapping, for use in the STP, and we prove that such tests are consistent against fixed alternatives. Simulation studies and real data examples are used to demonstrate the performance of the finite sample tests-based STP, yielding practical recommendations of their use as confidence estimators in combination with point estimates such as the Akaike information or Bayesian information criteria. In addition, we demonstrate that a modification of the STP yields a method that consistently selects the order of a finite mixture model, in the asymptotic sense. Our STP is not only applicable for order selection of finite mixture models, but is also useful for making confidence statements regarding any sequence of nested models.

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。

↑