Learn about calculating averages from grouped data with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

We study families of two-sample tests with grouped or multinomial data. The tests are based on models for which some function of hazard or continuation ratio probabilities in two distributions differ ...

Use of the proportional hazards regression model (Cox 1972) substantially liberalized the analysis of censored survival data with covariates. Available procedures for estimation of the relative risk ...