Survival Data Analysis
choice of parametric model in survival data analysis?
Survival of what exactly?
You could try an exponential N=A*exp(-Bt) as used for radioactive decays, with N the nu,ber of survivors.
A logistic function if the numbers of deaths show a normal distribution in time, like for car spare parts.
http://en.wikipedia.org/wiki/Logistic_distribution
Sustainable Development