Some New Results on the Distribution of the Sample Correlation Coefficient
样本相关系数分布的若干新结果AI 解读 ↓
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Summary A simple approximate normalization for the correlation coefficient in normal samples is obtained which is shown to compare favourably with previous normalization approximations (the usual large-sample normalization, Fisher's hyperbolic tangent transformation and Hotelling's improvement of that transformation). A second approximation, based on F and valid for large n | ρ | (n = sample size, ρ = population correlation), is also obtained. The results follow from a representation of the correlation in normal samples as the ratio of a linear combination of a standardized normal deviate and a Xn-1 to a Xn-2, where the three latter variates are independent.