Showing papers by "Arijit Chaudhuri published in 1981"
01 Jan 1981
TL;DR: In this paper, necessary and sufficient conditions for non-negativity of variance estimators are reviewed and some new sufficient conditions are also given, where necessary conditions for variance estimator nonnegativity are discussed.
Abstract: Results on necessary and sufficient conditions for non-negativity of variance estimators are briefly reviewed. Some new sufficient conditions are also given.
4 citations
TL;DR: In this article, the problem of non-negative estimation of the variance of the ratio estimator based on Sen-Midzuno[Sen], [midzuno] scheme of sampling is studied.
Abstract: Pursuing the works ofRao [1972, 1977] andChaudhuri [1976] the problem of non-negative estimation of the variance of the ratio-estimator based on Sen-Midzuno[Sen], [Midzuno] scheme of sampling is studied further. With this problem it is noted that (1) some of the recently published [videRao, 1972, 1977;Chaudhuri] non-negativity conditions can never be realised and (2) some other conditions can hold only in trivial circumstances. Similar results are observed in connection with other strategies of sampling finite population parameters as well.
3 citations