对二阶抽样中两个定理的扩充及其应用

Extension of two useful results in two-stage sampling and its applications

本文对德斯·拉奇(DesRaj)就不放回二阶抽样的估计量、估计量的方差及其估计提出的两个定理做了一些扩充,并对拉奥(Rao)-哈特利(Hartley)-科克伦(Cochran)提出的二阶RHC估计量运用扩充后的定理得到其方差估计量。

In this paper, we extend two useful results in two-stage sampling proved by Des Raj(1966) and use the extended results to study the Rao-Hartely-Cochran variance estimator.