关键词: 分类整群抽样, 不等概方法, 多项分布, 均值估计, 方差估计, 无偏性

Abstract: Basing on the multi nomial distribution and its nature, the paper conducts analysis of method of non-equal probability classified cluster sample survey and the un-bias estimation of mean, and further researches and provides the deviation square of the estimation and the un-bias estimation of the deviation square.