A Chi-Squared Goodness of Fit Test For Recurrent Event Data
Goodness of fit of the distribution function governing the time to occurrence of a recurrent event is considered. We develop a chi-squared type of test (henceforward called ℜ test) based on a nonparametric maximum likelihood estimator (NPMLE) of the inter-event time distribution for recurrent events. The test compares a parametric null to the NPMLE over k partitions of a calendar time over the monitoring period. We investigate small sample and asymptotic properties of four variants of the test as well as power analysis against a sequence of Pitman’s alternatives. The conclusion that transpires from the finite sample simulation study is that significant level is achieved when the right-censoring random variable is not ignored and k ≥ 6. We consider and discuss simulation results for Exponential, Weibull and Lognormal lifetime models. We apply the ℜ test to a real-life recurrent event data.
A. Adekpedjou and K. D. Zamba, "A Chi-Squared Goodness of Fit Test For Recurrent Event Data," Journal of Statistical Theory and Applications, vol. 11, no. 2, pp. 97-119, Gowas Publishers, Jan 2012.
Mathematics and Statistics
Keywords and Phrases
Recurrent Events; Gaussian Process; Pitman's Alternatives; Goodness of Fit
International Standard Serial Number (ISSN)
Article - Journal
© 2012 Gowas Publishers, All rights reserved.
01 Jan 2012