样本含量的逐步估算法

Stepwise Calculating Method in Sample Size

样本含量逐步估算法有客观可行性、必要性、优良适应性。样本含量逐步估算法适用于多阶段观察干预效应科学研究，样本含量逐步估算法可用于数值变量、分类变量资料，样本含量逐步估算法应逐步估算。本文介绍了两个样本含量逐步估算法实例，对涉及应用条件、逐步计算等的一些问题作了讨论。

The Stepwise Calculating Method (SCM) in estimating a sample size is necessary and of objective feasibility, as well as excellent adaptability. This method is being applied in scientific research observing interfering effects in multi-stages, and appropriate for the analysis of numerical and categorical variables. This article introduced two examples of the application of SCM, followed by discussions concerning the performing conditions and the stepwise calculating in them.