“…This estimator is known as the chain-type ratio estimator. This work was further extended by Kiregyera (1980;1984), Sahoo and Sahoo (1993), Tracy, Singh, and Singh (1996), Singh and Espejo (2007), Gupta and Shabbir (2007), Dash andMishra (2011), Shukla, Pathak, andThakur (2012), and Choudhury and Singh (2012), among others, who proposed various chain-type ratio and regression estimators. It may be noted that the most of these estimation procedures of the population mean in two-phase sampling are biased which becomes a serious drawback for their practical applications.…”