首页 | 本学科首页   官方微博 | 高级检索  
     


Double Sampling Ratio-product Estimator of a Finite Population Mean in Sample Surveys
Authors:Housila P. Singh  Mariano Ruiz Espejo
Affiliation:1. School of Studies in Statistics, Vikram University , India;2. Departamento de Matemáticas Fundamentales , UNED , Madrid, Spain
Abstract:It is well known that two-phase (or double) sampling is of significant use in practice when the population parameter(s) (say, population mean X¯) of the auxiliary variate x is not known. Keeping this in view, we have suggested a class of ratio-product estimators in two-phase sampling with its properties. The asymptotically optimum estimators (AOEs) in the class are identified in two different cases with their variances. Conditions for the proposed estimator to be more efficient than the two-phase sampling ratio, product and mean per unit estimator are investigated. Comparison with single phase sampling is also discussed. An empirical study is carried out to demonstrate the efficiency of the suggested estimator over conventional estimators.
Keywords:Auxiliary variate  double sampling ratio and product estimators  finite population mean  study variate
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号