摘要：The article presents predictive estimation of population mean of the study variable in
Ranked Set Sampling (RSS). It is shown that the predictive estimators in RSS using
mean per unit estimator, ratio estimator and regression estimator as predictor for
non-sampled values are equivalent to the corresponding classical estimators in RSS.
On the other hand, when product estimator is used as predictor, the resulting estimator
differs from the classical product estimator under RSS. Expressions for the
Bias and the Mean Squared Error (MSE) of the proposed estimators are obtained
up to first order of approximation. A simulation study is conducted to observe the
performance of estimators under predictive approach.
关键词：efficiency; product estimator; ratio estimator; regression estimator; RSS
