arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2209.08150stat.MEmath.STstat.TH
收藏

拟合优度的圆对称检验

Circularly Symmetric Tests of Goodness-of-Fit

Chuanhai Liu

AI总结:

本文提出圆对称拟合优度检验,通过圆化Anderson-Darling和Zhang统计量消除位置效应,模拟显示圆化Zhang最优,且渐近分布可高效计算。

摘要:

人们认识到,现有的强功效拟合优度检验均基于排序后的均匀分布,因此可能受到备择假设下分布与零假设下分布偏差中不同位置和不同信号频率的混杂效应的影响。本文提出了圆对称检验,通过对重新加权的Anderson-Darling检验进行圆化处理而获得,重点研究了Anderson-Darling和Zhang检验统计量的圆化版本。考虑了两种特定类型的圆化方式,一种是通过取相应的所谓扫描检验统计量的平均值,另一种是通过取最大值。在一定程度上,这种圆化技术有效消除了位置效应,并使权重能够聚焦于各种信号频率。一项有限但颇具说服力的有限样本性能模拟研究表明,圆化Zhang方法优于圆化Anderson-Darling方法,且圆化检验优于其母方法。对于平均型圆化,还获得了大样本理论结果。结果表明,圆化Anderson-Darling和圆化Zhang的渐近分布均为无限个独立标准正态随机变量平方的加权和。此外,核矩阵和函数是循环的。因此,通过快速傅里叶变换,渐近近似在计算上是高效的。

英文摘要:

It is realized that existing powerful tests of goodness-of-fit are all based on sorted uniforms and, consequently, can suffer from the confounded effect of different locations and various signal frequencies in the deviations of the distributions under the alternative hypothesis from those under the null. This paper proposes circularly symmetric tests that are obtained by circularizing reweighted Anderson-Darling tests, with the focus on the circularized versions of Anderson-Darling and Zhang test statistics. Two specific types of circularization are considered, one is obtained by taking the average of the corresponding so-called scan test statistics and the other by using the maximum. To a certain extent, this circularization technique effectively eliminates the location effect and allows the weights to focus on the various signal frequencies. A limited but arguably convincing simulation study on finite-sample performance demonstrates that the circularized Zhang method outperforms the circularized Anderson-Darling and that the circularized tests outperform their parent methods. Large-sample theoretical results are also obtained for the average type of circularization. The results show that both the circularized Anderson-Darling and circularized Zhang have asymptotic distributions that are a weighted sum of an infinite number of independent squared standard normal random variables. In addition, the kernel matrices and functions are circulant. As a result, asymptotic approximations are computationally efficient via the fast Fourier transform.

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。

↑