Some properties of a four-parameter beta-Weibull distribution are discussed. The beta-Weibull distribution is shown to have bathtub, unimodal, increasing, and decreasing hazard functions. The distribution is applied to censored data sets on bus-motor failures and a censored data set on head-and-neck-cancer clinical trial. A simulation is conducted to compare the beta-Weibull distribution with the exponentiated Weibull distribution.
Lee, Carl; Famoye, Felix; and Olumolade, Olugbenga
"Beta-Weibull Distribution: Some Properties and Applications to Censored Data,"
Journal of Modern Applied Statistical Methods:
1, Article 17.
Available at: http://digitalcommons.wayne.edu/jmasm/vol6/iss1/17