Ratio cum Median Based Modified Ratio Estimator for the Estimation of Finite Population Mean with Known Coefficient of Variation and Correlation Coefficient

S Jayalakshmi, Jambulingam Subramani
2016 Srija International Journal of Computer & Mathematical Sciences IJCMS   unpublished
The present paper discusses some ratio cum median based modified ratio estimators for estimating the finite population mean with known parameters of the auxiliary variable such as coefficient of variation and correlation Coefficient and their linear combinations. The performances of the proposed estimators are assessed with that of simple random sampling without replacement (SRSWOR) sample mean and ratio estimator in terms of their variances and or mean squared errors. The numerical comparison
more » ... s illustrated with the help of a natural population available in the literature and is observed that the proposed estimators perform better than the existing estimators.