文章基本信息

标题：Modified Factor-Type Estimators with Two Auxiliary Variables under Two-Phase Sampling
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作者：A. Audu ; A. A. Adewara
期刊名称：Annals. Computer Science Series
印刷版ISSN：1583-7165
电子版ISSN：2065-7471
出版年度：2017
卷号：15
期号：1
页码：63-76
出版社：Mirton Publishing House, Timisoara
摘要：In this paper, two modified factor-type estimators with two auxiliary variables for population mean have been suggested. Bias and MSE of the suggested estimators have been derived up to first order approximation using Tailor’s series expansion and the conditions for their efficiency over some existing estimators have been established theoretically. Empirical study was conducted using three dataset and the results revealed that the suggested estimators are more efficient.
关键词：Estimator; Auxiliary variable; Mean square error (MSE); Two-phase sampling.