Survival Analysis Overview Survival analysis studies time until an event occurs, handling censored data where events haven't happened for some subjects, enabling prediction of lifetimes and risk assessment. Key Concepts - Survival Time : Time until event - Censoring : Event not observed (subject dropped out) - Hazard : Instantaneous risk at time t - Survival Curve : Probability of surviving past time t - Hazard Ratio : Relative risk between groups Common Models - Kaplan-Meier : Non-parametric survival curves - Cox Proportional Hazards : Semi-parametric regression - Weibull/Exponential : Param…