The beta generalized Rayleigh distribution with applications to lifetime data

Statistische Hefte - Tập 54 - Trang 133-161 - 2011
Gauss M. Cordeiro1, Cláudio T. Cristino2, Elizabeth M. Hashimoto3, Edwin M. M. Ortega3
1Departamento de Estatística, Universidade Federal de Pernambuco, Recife, Brazil
2Departamento de Estatística e Informática, Universidade Federal Rural de Pernambuco, Recife, Brazil
3Departamento de Ciências Exatas, Universidade de São Paulo, Piracicaba, Brazil

Tóm tắt

For the first time, we propose a new distribution so-called the beta generalized Rayleigh distribution that contains as special sub-models some well-known distributions. Expansions for the cumulative distribution and density functions are derived. We obtain explicit expressions for the moments, moment generating function, mean deviations, Bonferroni and Lorenz curves and densities of the order statistics and their moments. We estimate the parameters by maximum likelihood and provide the observed information matrix. The usefulness of the new distribution is illustrated through two real data sets that show that it is quite flexible in analyzing positive data instead of the generalized Rayleigh and Rayleigh distributions.

Tài liệu tham khảo

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