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A Mixture Model of Two Different Distributions Approach to the Analysis of Heterogeneous Survival Data

Authors: Hamza Erol, Ülkü Erişoğlu, Murat Erişoğlu


In this paper we propose a mixture of two different distributions such as Exponential-Gamma, Exponential-Weibull and Gamma-Weibull to model heterogeneous survival data. Various properties of the proposed mixture of two different distributions are discussed. Maximum likelihood estimations of the parameters are obtained by using the EM algorithm. Illustrative example based on real data are also given.

Keywords: survival analysis, EM algorithm, Exponential-Gamma, Exponential-Weibull, Gamma-Weibull

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