关键词: 自适应群团抽样, 两阶段自适应群团抽样, Horvitz-Thompson估计量, Hansen-Hurwitz估计量

Abstract:

Two-stage ACS (adaptive cluster sampling) is an extended method of ACS,and it can to a certain degree control the final sample size of ACS.The procedure and principle of two-stage ACS are presented in this paper.Based on the survey data of <i>Hedysarum scoparium</i> in the western China,the simulation results of four different two-stage adaptive cluster samplings are compared and analyzed.It is showed that the Two-stage ACS,that is based on the modified Horvitz-Thompson estimator,is most effective,in which the clusters are not allowed to overlap primary unit.

Key words: adaptive cluster sampling, two-stage adaptive cluster sampling, Horvitz-Thompson estimator, Hansen-Hurwitz estimator