摘要
本文提出了一种二次等距抽样方法，并提出了总体平均值的一个估计量：拼配部分的比型估计与轮换部分的样本均值的加权平均。当样本量较大时，求出了估计量的方差及最优轮换比．并对特殊情形进行了讨论和数值比较．
This paper deals with sampling procedures of systematic sampling on two occasions.An estimator of the population mean has been proposed as a weighted average of a ratio type estimator of the matched portion and the sample mean of the unmatched portion.The variance of the estimator and the optimum unmatched proportion which minimizes the variance have been derived for large sample size.Special cases are discussed with numerical comparisons.
出处
《生物数学学报》
CSCD
北大核心
1994年第S1期14-21,共8页
Journal of Biomathematics
关键词
等距抽样
二次抽样
无偏估计
比型估计
轮换比
Systematic sampling,Sampling on two occasions,Unbiased estimator,Unmatched proportion
