Modeling Survival Time with Weibull and Exponential

Parametric survival analysis models survival time by assuming a specific probability distribution for when an event occurs. The Weibull and exponential distributions are two common choices because they are flexible and relatively straightforward to use.

The Weibull distribution is a flexible mode...

Weibull and exponential models are frequently used in survival analysis.

A two-parameter Weibull distribution has a survival curve given as follows.

Here, β determines the hazard function. A beta more than one indicates that the hazard rate is increasing with time with increasing risk over time t.

A beta less than o...