Document Type

Article

Publication Date

3-31-2021

Publication Title

South African Statistical Journal

Volume

55

Issue

1

Pages

45-54

Publisher Name

South African Statistical Association

Publisher Location

Stellenbosch, South Africa

Abstract

This paper develops a general approach for constructing a confidence interval for a parameter of interest with a specified confidence coefficient and a specified width. This is done assuming known a positive lower bound for the unknown nuisance parameter and independence of suitable statistics. Under mild conditions, we develop a modified two-stage procedure which enjoys attractive optimality properties including a second-order efficiency property and asymptotic consistency property. We extend this work for finding a confidence interval for the location parameter of the inverse Gaussian distribution. As an illustration, we developed a modified mean absolute deviation-based procedure in the supplementary section for finding a fixed-width confidence interval for the normal mean.

Comments

Author Posting © South African Statistical Association, 2021. This article is posted here by permission of the South African Statistical Association for personal use, not for redistribution. The article was published in the South African Statistical Journal, Volume 55, Issue 1, pp. 45-54, March 2021, https://dx.doi.org/10.37920/sasj.2021.55.1.4.

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