Acta Univ. Agric. Silvic. Mendelianae Brun. 2019, 67, 253-263
Published online 2019-02-28

Asymptotic Comparison of Parameters Estimates of Two-parameter Weibull Distribution

Tereza Konečná, Zuzana Hübnerová

Institute of Mathematics, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic

Received June 1, 2018
Accepted October 18, 2018

The Weibull distribution is frequently applied in various fields, ranging from economy, business, biology, to engineering. This paper aims at estimating the parameters of two-parameter Weibull distribution are determined. For this purpose, the method of quantiles (three different choices of quantiles) and Weibull probability plot method is utilized. The asymptotic covariance matrix of the parameter estimates is derived for both methods. For optimal random choices of quantiles, the variance, covariance and generalized variance is computed. The main contribution of this study is the introduction of the best choice of percentiles for the method of quantiles and the joint asymptotic efficiency comparison of applied methods.


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