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A study of the power and robustness of a new test for independence against contiguous alternatives

机译:对针对连续替代方案的独立性的新测试的功效和鲁棒性的研究

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Various association measures have been proposed in the literature that equal zero when the associated random variables are independent. However many measures, (e.g., Kendall’s tau), may equal zero even in the presence of an association between the random variables. In order to overcome this drawback, Bergsma and Dassios (2014) proposed a modification of Kendall’s tau, (denoted as $au^{*}$), which is non-negative and zero if and only if independence holds. In this article, we investigate the robustness properties and the asymptotic distributions of $au^{*}$ and some other well-known measures of association under null and contiguous alternatives. Based on these asymptotic distributions under contiguous alternatives, we study the asymptotic power of the test based on $au^{*}$ under contiguous alternatives and compare its performance with the performance of other well-known tests available in the literature.
机译:文献中已经提出了各种关联度量,当关联的随机变量是独立的时,它们等于零。但是,即使在随机变量之间存在关联,许多指标(例如,肯德尔的tau)也可能等于零。为了克服这一缺点,Bergsma和Dassios(2014)提出了对Kendall tau(表示为$ tau ^ {*} $)的一种修改,该表达式非负且当且仅当独立时才为零。在本文中,我们研究了$ tau ^ {*} $的鲁棒性和渐近分布以及其他一些在空和连续替代项下的关联度量。基于这些连续选择下的渐近分布,我们研究了基于$ tau ^ {*} $在连续选择下的测试的渐近能力,并将其性能与文献中可用的其他知名测试的性能进行比较。

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