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A new lifetime model: the Kumaraswamy generalized Rayleigh distribution. (English) Zbl 1453.62686

Summary: The generalized Rayleigh (GR) distribution [V. Gh. Vodă, Apl. Mat. 21, 395–419 (1976; Zbl 0362.62035)] has been applied in several areas such as health, agriculture, biology and other sciences. For the first time, we propose the Kumaraswamy GR (KwGR) distribution for analysing lifetime data. The new density function can be expressed as a mixture of GR density functions. Explicit formulae are derived for some of its statistical quantities. The density function of the order statistics can be expressed as a mixture of GR density functions. We also propose a linear log-KwGR regression model for analysing data with real support to extend some known regression models. The estimation of parameters is approached by maximum likelihood. The importance of the new models is illustrated in two real data sets.

MSC:

62N05 Reliability and life testing
62E10 Characterization and structure theory of statistical distributions
62F10 Point estimation

Citations:

Zbl 0362.62035
Full Text: DOI

References:

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