springs {SMPracticals} | R Documentation |
Failure times of 60 springs divided into 6 groups of 10, with each group subject to a different level of stress. Some of the times are right-censored.
data(springs)
A data frame with 60 observations on the following 3 variables.
Cox, D. R. and Oakes, D. (1984) Analysis of Survival Data. London: Chapman and Hall/CRC Press.
data(springs) attach(springs) plot(cycles~stress) plot(cycles~stress,log="y")