Record Details

An Application of Calibration approach for Estimation of Population Ratio

KrishiKosh

View Archive Info
 
 
Field Value
 
Title An Application of Calibration approach for Estimation of Population Ratio
M Sc
 
Creator Raju Kumar
 
Contributor S. D. Wahi
 
Subject diseases, crossing over, vegetables, heterosis, fruits, planting, yields, additives, biological phenomena, genetics
 
Description T-8639
The calibration approach is frequently used to develop estimators of various population parameters of interest. The calibration approach involves deriving revised weights and using these weights in the form of a weighted estimator. The revised weights are developed by minimizing a distance function subject to the constraint that the weighted sample mean of auxiliary variables is equal to the population mean/total of the auxiliary variable. Generally, a chi-square type distance function is used for deriving revised weights. The approach is called as lower level calibration. A higher level calibration approach has been developed by Singh (1998) to improve the estimate of variance of the Horvitz-Thompson (1952) estimator. The higher level calibration approach makes use of known population variance of the auxiliary character. Many a times the chi-square type distance function gives negative weights. The negative weights when used in the variance estimator will give negative variance estimator. We use quadratic programming approach to obtain non-negative weights. For the application of quadratic approach a program was written in SAS.
 
Date 2016-09-19T17:59:32Z
2016-09-19T17:59:32Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/77531
 
Format application/pdf
 
Publisher IARI, Indian Agricultural Statistics Research Institute