 Kaplan–Meier estimator

The Kaplan-Meier product-limit estimator multiplies factors $1-d_j/n_j$ over event times.

The Kaplan–Meier estimator is a statistical tool used to estimate the survival function from lifetime data. It is particularly useful in medical research for analyzing time-to-event data, such as the time until an event of interest occurs (like death, relapse, or failure) when some subjects are censored, meaning they leave the study or do not experience the event during the observation period.