On Double Sampling Ratio‐Cum‐Product‐Type Estimator with Independent Samples

Abstract

There are two caees in double sampling; ceee(i) when the eecond sample is a sub-aample from preliminary large sample. and ccree(ii) when the eeoond sample is not a nub-sample from the preliminary large sample. Remntly SIsODIA and DWIWDI (1981) propoeed a ratio cum product-type estimator in double sampling in whioh they have studied the properties of thiu estimator under case (i). In thie paper, we have made an attempt to study the properties of the same estimator under ~8 8 8(ii). It ie found that the estimator is superior than double sampling linear regreesion eatimator. umal ratio sethator, product estimator and among others. The estimator ie 81x1 compared with simple mean per unit for a given coet of the survey.