Estimation of a population mean of a sensitive variable in stratified two-phase sampling

In this study,we present the estimation of population mean of a sensitive variable in stratified sampling using two-phase sampling based on randomized response technique. we introduce a ratio,a regression and general class of estimators for the mean of sensitive variable using non-sensitive auxiliary variable based on randomized response technique in stratified two-phase sampling. under stratified two phase sampling,the expression of bias and mean square error (mse) up to the first-order approximations are derived. simulation studies and real data are presented to demonstrate the performance of proposed estimators. © 2016 pakistan journal of statistics.