Description

We consider some distributions that are useful in survival analysis. In the literature on

survival analysis, certain parametric models have been used such as exponential and

Weibull models. Log-normal and gamma distribution are generally less convenient

computationally, but are still frequently applied. Here we discuss some of the standard

failure time models for homogeneous populations. The properties and the theoretical

bases of these distributions are considered briefly. The distributions will be studied in

the simplest case of independently and identically distributed random variables. The

random variable T denote the lifetime which we are interested in making inferences

about.