On Two-Stage Sampling for Fixed-Width Interval Estimation of the Common Variance of Equi-Correlated Normal Distributions

摘要

The present article presents two-stage procedures for fixed-width interval estimators of the common variance of equi-correlated normal distributions. This study is a continuation of those of Zacks and Ramig (1987) and Ghezzi and Zacks (2005). We derive formulae for the distributions of total sample sizes and their functionals.