Abstract

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.

中文翻译：

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调查抽样中人口中位数的差分类型估计量的改进类

摘要

我们针对简单随机抽样 (SRS) 和两阶段抽样 (TPS) 下的总体中位数提出了两种新的改进类差异类型估计器。偏差和 MSE 的表达式被推导到一阶近似值。我们将提议的估计量与文献中所有其他常见的估计量进行比较。数值结果表明，与此处考虑的所有其他估计器相比，所提出的估计器类别表现更好。