期刊名称：Pakistan Journal of Statistics and Operation Research
印刷版ISSN：2220-5810
出版年度：2007
卷号：3
期号：1
页码：59-62
DOI：10.1234/pjsor.v3i1.78
出版社：College of Statistical and Actuarial Sciences
摘要：A new approximate formula for sampling variance of Horvitz–Thompson (1952) estimator has been obtained. Empirical study of the approximate formula has been given to see its performance.
