Product-limit Estimators of the Survival Function with Left or Right Censored Data
The problem of estimating the distribution of a lifetime when data may be leftor right censored is considered. Two models are introduced and the correspondingproduct-limit estimators are derived. Strong uniform convergence and asymptoticnormality are proved for the product-limit estimators on the whole range of theobservations. A bootstrap procedure that can be applied to con¯dence intervalsconstruction is proposed.