Full paper
Full paper

Testing Failure Data for Evidence of Aging

Yu Hayakawa
Sue Paul
Tony Vignaux


This paper presents an application of a Bayesian nonparametric method to hypothesis testing between exponential and increasing failure rate (IFR) distributions. The weighted gamma process is selected as a prior on the space of non-decreasing failure rates. Monte Carlo simulations of the weighted Chinese restaurant process provide an approximation to the posterior probability of each hypothesis.