Gs. Mudholkar et Dk. Srivastava, EXPONENTIATED WEIBULL FAMILY FOR ANALYZING BATHTUB FAILURE-RATE DATA, IEEE transactions on reliability, 42(2), 1993, pp. 299-302
A simple generalization of the Weibull distribution offered here is we
ll suited for modeling bathtub failure rate lifetime data and for test
ing goodness-of-fit of the Weibull and negative exponential models as
subhypotheses.