We consider data subjected to middle censoring where the variable of interest becomes unobservable when it falls within an interval of censorship. A necessary and sufficient condition is developed for the equivalence of self-consistent estimators and NPMLEs. Finding NPMLE by dividing the data...

The Weibull proportional hazards model is commonly used for analysing survival data. However, formal tests of model adequacy are still lacking. It is well known that residual-based goodness-of-fit measures are inappropriate for censored data. In this paper, a graphical diagnostic plot of...