集团抽样不等概方法的均值估计及其性质

在集团抽样调查中，［１］和［２］给出了一般抽样方法及均值估计和它性质的论述，但未考虑各集团在总体中的地位对估计结果的影响．本文给出了集团抽样的不等概方法和均值的无偏估计，同时也给出了这种估计的方差及方差的无偏估计．

Estimate of Mean with Its Character in Method of Unequal Probability in Group Sampling

In the research of group sampling, and give the estimate of mean with its character in the common method of group sampling, but they do not pay attention to the effect of each group in the general stage to estimate result. In this paper it not only gives the method of unequal probability in group sampling and unbiassedness of mean estimation and also gives the variance and its unbiassedness of estimation.