市场调研中的混合双重分层抽样方法

The Method of Mixed two-phase Stratified Sampling in Market Research

提出了一种叫做混合双重分层抽样的方法,描述了怎样将它用到市场调研中去;给了一个实际例子来详细讨论这种方法,同时也近似地用图来说明这种方法的误差.

A method named mixed two-phase stratified sampling is firstly put forward, and how to use it in market research is also analyzed. Then, a practical example is discussed discuss in detail. At the same time, diagrams are used to illustrate sampling error of this method.