Critical value model of sample correlation coefficient after windowed moving average

Critical value model of sample correlation coefficient after windowed moving average
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加窗移动平均后样本相关系数的临界值模型

DOI:
10.1080/00949655.2018.1531863
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发表时间:
2018-10
影响因子:
1.2
通讯作者:
Juan Zhao
Juan Zhao
中科院分区:
数学4区
文献类型:
--
作者:
Haibo Lin;Li Chen;Juan Zhao

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相关系数临界值随加窗移动平均值、自由度和置信度ξ的变化而变化,被广泛用于判断两个独立样本之间的线性关系xandy。为了避免参考不方便的临界值表或使用耗时的蒙特卡罗(MC)模拟,本文提出了一个数学上统一的临界值计算模型。在本文中,两个独立样本xandy都服从标准正态分布。我们对这些样本的MC结果进行了分析,建立了模型参数,然后对三个不同天文场的模型结果进行了检验,计算了样本相关系数的置信水平ξ,并与MC结果进行了比较。结果表明,MC结果与模型结果吻合得非常好,在计算两个独立样本的样本相关系数时,模型对置信水平ξ的适用性令人满意。
The critical value of correlation coefficient, which varies with the degree of windowed moving averagek, freedomnand confidenceξ, is widely accepted to judge the linear relationship between two independent samplesXandY. In order to avoid referring to inconvenient critical value tables or using time-consuming Monte Carlo (MC) simulation, this paper presents a mathematically unified model for calculating the critical value. In this paper, both independent samplesXandYfollow the standard normal distribution. We analyse MC resultfor these samplesX,Yto establish the model parameters and then examine the model resultfor three different astronomical fields to calculate the confidence levelξof sample correlation coefficient, which is compared with MC result. The results show that the MC resultsand model resultsare in exceptionally good agreement, and the applicability of the model to obtain the confidence levelξis satisfactory when calculating the sample correlation coefficientfor two independent samplesXandY.
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