Bahareh Khatib Astaneh - Department of Mathematics, University of Neyshabur

In the situations in which the lifetimes of the experimental units are related to some covariates, the Gompertz model may be considered to fit the real data. In this paper, it is assumed that the lifetimes are related to a fixed covariate and the unknown parameters of the model of interest are estimated via maximum likelihood approach. The survival function as well as the hazard function of the model are estimated and the results are applied on a real data set.

Fixed covariate model, Lifetime, Maximum likelihood estimation, Q-Q plot