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第七章 抽样推断 PowerPoint PPT Presentation


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第七章 抽样推断. 一、抽样的基本概念 1、全及总体和样本总体 2、全及指标和抽样指标 3、样本容量和样本个数 4、重复抽样和不重复抽样. 二、抽样误差 1、抽样平均误差 重复抽样: 不重复抽样:. 2、抽样极限误差. 练习:. 1 、抽样误差是指( )。 A 、在调查过程中由于观察、测量等差错所引起的误差 B 、在调查中违反随机原则出现的系统误差 C 、随机抽样而产生的代表性误差 D 、人为原因所造成的误差 答案: C 2 、反映样本指标与总体指标之间的平均误差程度的指标是( )。 A 、抽样误差系数 B 、概率度

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第七章 抽样推断

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