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二分类数据存在误分类时剔除阈值附近观测的影响AI 解读

This article deals with the biasing effects of errors of measurement on the estimation of a population proportion or on the degree of association between two dichotomous variables. Consider a dichotomy that is formed by making a cut on an ordered scale, where errors of classification occur with greatest frequency in the neighborhood of the cut. It is demonstrated through numerical investigation that it is advantageous, both in terms of bias and of mean square error, to…

二项数据存在分类误差时剔除切点附近观测的影响AI 解读

This article deals with the biasing effects of errors of measurement on the estimation of a population proportion or on the degree of association between two dichotomous variables. Consider a dichotomy that is formed by making a cut on an ordered scale, where errors of classification occur with greatest frequency in the neighborhood of the cut. It is demonstrated through numerical investigation that it is advantageous, both in terms of bias and of mean square error, to…

分层抽样与总体中位数的无分布置信区间AI 解读

This paper presents the results of a limited investigation which brings into focus the difficulties encountered in developing exact distribution-free methods for stratified simple random sampling. It is shown that exact distribution-free confidence intervals for a population median can be obtained from a stratified sample under very special circumstances. The principal result concerns the order statistics of the combined separate strata samples, where proportional allocation…

分层抽样与总体中位数的分布无关置信区间AI 解读

This paper presents the results of a limited investigation which brings into focus the difficulties encountered in developing exact distribution-free methods for stratified simple random sampling. It is shown that exact distribution-free confidence intervals for a population median can be obtained from a stratified sample under very special circumstances. The principal result concerns the order statistics of the combined separate strata samples, where proportional allocation…