Inference on the ratio of two coefficients of variation of two lognormal distributions

Jun-mo Nam and Deukwoo Kwon

Communications in Statistics - Theory and Methods, 2017, vol. 46, issue 17, 8575-8587

Abstract: The coefficient of variation (CV) can be used as an index of reliability of measurement. The lognormal distribution has been applied to fit data in many fields. We developed approximate interval estimation of the ratio of two coefficients of variation (CsV) for lognormal distributions by using the Wald-type, Fieller-type, log methods, and method of variance estimates recovery (MOVER). The simulation studies show that empirical coverage rates of the methods are satisfactorily close to a nominal coverage rate for medium sample sizes.

Date: 2017
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DOI: 10.1080/03610926.2016.1185118

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