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Improved class of difference-type estimators for population median in survey sampling

机译:改进了调查抽样中群体中位数的差异型估算类

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摘要

We propose two new improved class of difference type estimators for population median under simple random sampling (SRS) and two-phase sampling (TPS). Expressions for bias and MSE are derived up to first order of approximation. We make a comparison of proposed estimators with all other commonly known estimators in literature. Numerical findings show that the proposed class of estimators perform better as compared to all other estimators considered here.
机译:在简单的随机采样(SRS)和两相采样(TPS)下,我们提出了两个新的改进的群体中位数差异类型估算。偏差和MSE的表达式派生至第一阶近似。我们对文献中的所有其他常见知名估计人进行了比较。数值调查结果表明,与此处考虑的所有其他估算相比,所提出的估计量表现得更好。

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