样本量估计与检验效能分析(四)(英文)

Estimation of sample size and testing power (Part 4)

样本含量估计是任何一项实验研究或调查研究都不可回避的问题。根据已知的基本情况和统计学知识,估计出合适的样本含量在科研实践中是十分有意义的。本文介绍了拟作成组设计定量资料与定性资料差异性检验时的样本含量估计方法。具体地说,就是仅针对成组设计且为差异性检验的情形,介绍了效应指标为定量资料和定性资料时估计样本含量的计算公式,以及基于公式和借用SAS软件中POWER过程分别实现样本含量估计的方法,并通过实例进行了讲解,对科研工作者在实验设计时正确落实重复原则具有很好的指导作用。

Sample size estimation is necessary for any experimental or survey research. An appropriate estimation of sample size based on known information and statistical knowledge is of great significance. This article introduces methods of sample size estimation of difference test for data with the design of one factor with two levels, including sample size estimation formulas and realization based on the formulas and the POWER procedure of SAS software for quantitative data and qualitative data with the design of one factor with two levels. In addition, this article presents examples for analysis, which will play a leading role for researchers to implement the repetition principle during the research design phase.