A Modified Dual to Ratio Cum Product Estimator Using Two Auxiliary Variables in Stratified Sampling for Estimating Population Mean

Two-phase Ratio-type Estimator of a Finite Population Mean

“…The approximate variance (Ahmed et al [9]) of each of the estimator given in ( 1) to (6) and in ( 7) are computed using each of the real population described below and the performance of an estimator ̂ is calculated in terms of percentage relative efficiency (PRE), ( ̅ ̅ ⁄ )…”

“…Kiregyera [7,8] suggested various estimators using two auxiliary variables under twophase sampling. Nazir et al [9] developed an estimator for the population mean under stratified sampling using two auxiliary variables. Motivated from the above work, in such situations, we wish to estimate the population mean under two-phase sampling using simple random sampling at both the phases.…”