第5章抽样技术 Sampling Technology
第5章 抽样技术 Sampling Technology
基本抽样问题 基本概念 制定抽样计划的步骤 抽样误差与非抽样误差 概率抽样方法 非概率抽样方法
一、基本抽样问题 • 基本概念 • 制定抽样计划的步骤 • 抽样误差与非抽样误差 • 概率抽样方法 • 非概率抽样方法
本节概要(1) To understand the concept of sampling To learn the steps in developing a sampling pla an To understand the differences between probability samples and nonprobability samples To understand the concepts of sampling error and nonsampling error
本节概要（1） • To understand the concept of sampling. • To learn the steps in developing a sampling plan. • To understand the differences between probability samples and nonprobability samples. • To understand the concepts of sampling error and nonsampling error
本节概要(2) To review the types of probability sampling methods To gain insight into nonprobability sampling methods
本节概要（2） • To review the types of probability sampling methods. • To gain insight into nonprobability sampling methods
基本概念 Population(总体) The total group of people from whom information is needed Census(普查) Data obtained from or about every member of the population of interest Sample(样本) A subset of the population of interest
基本概念 • Population（总体） – The total group of people from whom information is needed. • Census（普查） – Data obtained from or about every member of the population of interest. • Sample（样本） – A subset of the population of interest