[PDF] Top 20 An Ecient Class of Estimators of Population Mean in Two-Phase Sampling Using Two Auxiliary Variables

... type estimators based on two auxiliary variables in two-phase ...type estimators in two-phase sampling based on two auxiliary ... See full document

... the population mean under two-phase ...on two-auxiliary variables, a system of estimators for estimating the finite population mean is proposed and ... See full document

... paper, two modified factor-type estimators with two auxiliary variables for population mean have been ...suggested estimators have been derived up to first order ... See full document

... of two auxiliary variables in the estimation of the population mean of the variable ...the population means of the two auxiliary variables are ...the ... See full document

... double sampling was first proposed by Neyman [1] in sampling human populations when the mean of auxiliary variable was ...multi-phase sampling using multi- ... See full document

... of population variance in presence of random non-response are discussed on the assumption that either population mean or both population mean and variance of the auxiliary ... See full document

... a class of estimators for the finite population mean that is decidedly better than some other classes gathering information on two auxiliary variables in a ... See full document

... a class of Hartley-Ross type unbiased estimator in ...unbiased estimators in RSS and stratified ranked set sampling ...finite population mean in ... See full document

... based estimators of the population mean under the framework of two-phase sampling in presence of an auxiliary ...proposed estimators, over some prevalent existing ... See full document

... exponential estimators while Singh and Vishwakarma [12] extended the exponential ratio and product type estimators to double-phase ...a class of ratio-product estimators in ... See full document

... estimating population mean, sample mean is the most appropriate ...sample mean. This is achieved through the use of an auxiliary variable that has strong positive or negative ... See full document

... the population ratio (R) of the population means of two variables (y and x) under Simple Random Sampling (SRS) scheme, using a variable transformation of the auxiliary ... See full document

... Double sampling is cost effective sampling design, and precision of ratio and regression estimates of study ...Double sampling increases if there is a high degree of correlation between the ... See full document

... (2012) estimators t 11 and Singh et al’s (2009) estimator t 14 are less efficient than the estimators t 6 , t 7 , t 9 , t 12 , t 13 and t 15 at their optimum ...a class of estimators based on ... See full document

... generalized class of estimators of population mean, ratio and product of population means using auxiliary information of two variables in presence of ... See full document

... of population mean of ...of auxiliary variate has also been in practice for improving the efficiency of the estimators of finite population ...situations population coefficient ... See full document

... in sampling theory. Auxiliary variables are commonly used in sample survey practices to obtain improved designs and to achieve higher precision in the es- timates of some population parameters ... See full document

... exponential estimators while Singh and Vishwakarma [12] extended the exponential ratio and product type estimators to double-phase ...a class of ratio-product estimators in ... See full document

... surveys using multi-stage sampling the survey practitioner comes across more than one auxiliary variable either positively or negatively correlated with main variable (y) under study at different ... See full document

... the population mean X of auxiliary variables X is not known but X is correlated to another auxiliary variable Z whose population mean Z is known, then information on Z can ... See full document