Unbiased Estimators Using Auxiliary Information for the Finite Population Mean Under Two-Phase Sampling
摘要
Abstract
In this paper, an unbiased ratio estimator based on Tin (1965), an unbiased product estimator based on Robson (1957) and an unbiased estimator based on Mahanty and Mishra (2020) by using auxiliary information was developed under two-phase sampling. The efficiency of the estimators is shown both theoretically and numerical illustration. The unbiased estimator based on Mahanty and Mishra is more efficient than other estimators.