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基于广义排序集样本的分位数估计

Keywords: 排序集抽样,分位数,加权估计,渐近方差,最优抽样设计

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Abstract:

为提高总体分位数的估计效率,提出基于广义排序集抽样的非参数加权估计量.根据估计量的强相合性和渐近正态性,给出了在任意给定的抽样方案下使渐近方差达到最小的权数.再利用最优权数的适应任意分布性,证明出使估计效率达到最大的抽样方案是从所有排序小组中挑选具有同一次序的观测值.通过对渐近相对效率的数值计算和一组真实数据的实际应用,表明最优加权估计功效高于无权估计,最优排序集抽样效率高于标准排序集抽样和简单随机抽样.

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