Abstract:
This article discusses three ratio-cum-product estimators forthe population mean using the coefficient of correlation on simple random sampling i.e. ratio-cum-product
estimator, dual ratio-cum-product estimator, and combination dual ratio-cum-product
estimator. Thethree estimators are biased estimators. Then themean square errors are Determined Furthermore, these mean square errors are compared to the mean square error of each estimator.This comparison shows that the combination dual ratio-cum-
product estimator using coefficient of correlationis more efficient than other estimators.