摘要
随机化是试验设计4个基本原则之一。随机化通常分为从总体中随机抽取样品和将全部样品随机分组。前者简称为随机抽样,而后者简称为随机分组。在随机分组中,又可细分为完全随机分组、分层随机分组和动态随机分组。本文将介绍完全随机化的步骤、动态随机分组的概念以及用SAS软件实现随机抽样与随机分组。
Randomization is one of the four basic principles of research design.The meaning of randomization includes two aspects：one is to randomly select samples from the population,which is known as random sampling;the other is to randomly group all the samples,which is called randomized grouping.Randomized grouping can be subdivided into three categories：completely,stratified and dynamically randomized grouping.This article mainly introduces the steps of complete randomization,the definition of dynamic randomization and the realization of random sampling and grouping by SAS software.
出处
《中西医结合学报》
CAS
2011年第7期711-714,共4页
Journal of Chinese Integrative Medicine
关键词
统计学
医学
研究设计
随机分配
SAS程序
statistics
medical
research design
random allocation
SAS program
