知识与财富的链接
针对2005年天津市国民体质监测工作,论述了确定抽样方案的原则,根据此原则设计了抽样方法——天津市国民体质监测采用分层抽样、二阶段或三阶段与大小成比例（PPS法）的随机等距法、简单随机抽样等方法选取调查样本;并根据指标的估计精度要求以及所用抽样方案的设计效应．确定了应抽取的样本量,同时给出了测试指标总体均数和方差的估计方法。
In this paper, aimed the national physical fitness survey in Tianjin in 2005, the authors discussed the sampling project, the possibility of the project operation, representativeness of sample, and the accuracy of the sampling. According these, developed the sampling method in physical fitness survey in Tianjin-hierarehy sampling, PSS, random equidistance method and simple random sampling. So the number of sample was determined, and the estimation method of total mean and deviation were given.
