【摘要】 在我国社会经济统计中,经常会用到分层抽样,这是因为在一些实际问题中,"层"常按照调查对象的不同类型而划分.将方差估计中的随机组方法运用到分届抽样中,估计了Warner模型估计量的方差.更多还原

【Abstract】 Stratified sampling is often used in our social and economic statistics because the "layer" is often classified according to the survey’s types in a number of practical problems.The random group method was used for the stratified sampling in variance estimation,and the variance estimation in Warner model was obtained.更多还原