3969

Fatemeh Omidi, Arezou Habibirad and Vahid Fakoor

مجله پژوهشهاي آماري ايران

تهران :پژوهشكده آمار ايران

2019

16

2

507-533

Cramer-von Mises statistic , cumulative Kullback-Leibler information , cumulative residual Kullback-Leibler information; , xponential distribution , Kaplan-Meier estimator , randomly censored data

We propose two goodness of fit test statistics based on Cumulative Kullback-Leibler (CKL) information and Cumulative residual Kullback- Leibler (CRKL) information for exponential distributions with unknown parameter and randomly censored data. Koziol and Green introduced the Cramer-von Mises statistic with randomly censored data for a simple hypothesis based on the Kaplan-Meier product limit of the distribution function. We use their idea to obtain test statistics based on CKL and CRKL for a randomly censored exponential distribution with estimated parameters. The power of the proposed tests for testing exponentiality is compared with the test statistic based on the empirical distribution function using the opinion of Koziol and Green. A simulation study is performed under a special censorship model introduced by Koziol and Green. Simulation studies show a relatively high power of proposed test statistics in many alternatives