Survreg produces MLE estimates. For your second question, don't know what you are asking. Can you be more specific and detailed?
---begin included message -- Do you know if the parameters estimators are MLE estimators? One more question: In my case study I have failures that occured on different objects that have different age and length, could I use weight to find the estimates of a weibull law and so to find the probabilty of failure per unit of length for example? ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.