• Dr.R. Srija
• Dr.P.Vetri Selvi

In this paper, some ratio cum median based modified ratio estimators with known quartiles and skewness of the auxiliary variable have been proposed. The performance of the proposed class of estimators is assessed with that of simple random sampling without replacement (SRSWOR) sample mean, ratio estimator and modified ratio estimators in terms of variance/mean squared errors. The performance of proposed class of estimators is illustrated with the help of certain natural population available in the literature. The percentage relative efficiency of the proposed class of estimators with respect to SRSWOR sample mean, ratio estimator and some of the existing modified ratio estimators are also obtained.

Auxiliary variable; Bias; Mean squared error; Natural population; Percentage relative efficiency; Simple random sampling

"RATIO CUM MEDIAN BASED MODIFIED RATIO ESTIMATORS WITH KNOWN QUARTILES AND SKEWNESS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 2, page no.989-994, February-2019, Available :http://www.jetir.org/papers/JETIRAB06185.pdf

"RATIO CUM MEDIAN BASED MODIFIED RATIO ESTIMATORS WITH KNOWN QUARTILES AND SKEWNESS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 2, page no. pp989-994, February-2019, Available at : http://www.jetir.org/papers/JETIRAB06185.pdf