For the ratio estimate in two-stagesampling, the bias and mean square errors(MES) of the estimater value have been obtained, and the estimater value of the MSE has been given.
给出了二阶比估计量的偏差、估计量的均方误差以及均方误差的估计。
2
Method:254 people aged 51~75 with twostagesampling were investigated by using multifactor analyses.
方法:采用二阶段抽样法对254名51~75岁居民用多因素分析法进行了调查分析。
3
This paper studies the second stagesampling methods used in the twostagesampling survey for waterway transportation volume.