Format
A data frame with 33 observations on the following 3 variables.
Source
Feigl, P., and Zelen, M. (1965), Estimation of Exponential Survival Probabilities With Concomitant Information, Biometrics, 21, pp. 826-838.
Ibrahim, Joseph G. (1990). Incomplete Data in Generalized Linear Models. Journal of the American Statistical Association, Vol.85, No. 411, pp. 765 - 769.