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arXiv 2302.08795math.STmath.PRstat.TH
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时间序列结构变化加权检验统计量的功效

Power of Weighted Test Statistics for Structural Change in Time Series

Herold Dehling, Kata Vuk, Martin Wendler

AI总结:

研究常见变点检验的功效与变点位置的关系,基于加权U统计量最大值,发现在时间区间两端变化时加权检验功效更强,中心处减弱。

摘要:

我们研究了一些常见变点检验的功效作为变点位置的函数。检验统计量是加权U统计量的最大值,以CUSUM检验和Wilcoxon变点检验为特例。我们在局部备择假设下研究功效,同时改变变点的位置和变化幅度。我们量化了检验的加权版本在变化发生在时间区间开头或结尾时如何更具功效,而在应对中心处的变化时功效降低。

英文摘要:

We investigate the power of some common change-point tests as a function of the location of the change-point. The test statistics are maxima of weighted U-statistics, with the CUSUM test and the Wilcoxon change-point test as special examples. We study the power under local alternatives, where we vary both the location of the change-point and the magnitude of the change. We quantify in which way weighted versions of the tests are more powerful when the change occurs near the beginning or the end of the time interval, while losing power against changes in the center.

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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