On a Class of Almost Unbiased Ratio Estimators
โ Scribed by R. S. Biradar; Dr. H. P. Singh
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 292 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0323-3847
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
A class of almost unbiased ratio estimators for population mean ฯ is derived by weighting sample ฯ = (1/n) ฯ y~i~, ratio estimators ฯ and an estimator, ฯ (y~i~/x~i~). It is shown that NIETO DE PASCUAL (1961) estimator is a particular member of the class and an optimum estimator in the class (in the minimum variance sense) is identified. The results are illustrated through two numerical examples.
๐ SIMILAR VOLUMES
Assuming normality of observations an almost unbiased estimator of heritability (P) for half-sib data design has been obtained. Results of bias in the conventional estimator for several combinations of sireldam number and h\* are discussed for the balanced situation.
## Abstract The use of the negative binomial distribution in both the numerator and denominator in prospective studies leads to an unbiased estimate of the odds ratio and an exact expression for its variance. Sample sizes that minimize the variance of odds ratio estimates are specified. The varianc