| 二次等距抽样 |
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| 引用本文： | 任瑞林,马湘玲. 二次等距抽样[J]. 生物数学学报, 1994, 0(Z1) |
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| 作者姓名： | 任瑞林 马湘玲 |
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| 作者单位： | 郑州大学系统科学与数学系!郑州450O52(任瑞林)，河南医科大学基础医学院!郑州45O052(马湘玲) |
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| 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．
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| 关 键 词： | 等距抽样 二次抽样 无偏估计 比型估计 轮换比 |
SYSTEMATIC SAMPLING ON TWO OCCASIONS |
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| Ren Ruilin,Ma Xiangling. SYSTEMATIC SAMPLING ON TWO OCCASIONS[J]. Journal of Biomathematics, 1994, 0(Z1) |
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| Authors: | Ren Ruilin Ma Xiangling |
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| Abstract: | 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. |
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| Keywords: | Systematic sampling Sampling on two occasions Unbiased estimator Unmatched proportion |
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