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删失生存数据检验的有效样本量AI 解读

When survival experience of two groups is compared in the presence of arbitrary right censoring, the effective sample size for determining the power of the test used is usually taken to be the number of uncensored observations. This convention is examined through a Monte Carlo study. Empirical powers of the generalized Savage test and generalized Wilcoxon test with uncensored data are compared to those with censored data containing approximately the same number of uncensored…

删失生存数据检验的有效样本量AI 解读

When survival experience of two groups is compared in the presence of arbitrary right censoring, the effective sample size for determining the power of the test used is usually taken to be the number of uncensored observations. This convention is examined through a Monte Carlo study. Empirical powers of the generalized Savage test and generalized Wilcoxon test with uncensored data are compared to those with censored data containing approximately the same number of uncensored…

二维列联表相关性检验的抽样表现AI 解读

In the two-way contingency table with ordered categories, commonly used measures of association include Γ, τ b , τ c , the correlation coefficient, and Spearman's rank correlation. We propose a new formula for the asymptotic standard error (ase) of each statistic, and compare its behavior to that of previous formulas when used in a test of the hypothesis that the measure is zero.

回归函数的非参数估计AI 解读

Summary We consider a nonparametric technique proposed by Priestley and Chao (1972) for estimating an unknown regression function. Conditions for strong convergence and asymptotic normality are discussed. Special consideration is given to the optimal choice of a weighting function.