SMPracticals (version 1.3-1)

springs: Spring Failure Data

Description

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.

Usage

data(springs)

source

Cox, D. R. and Oakes, D. (1984) Analysis of Survival Data. London: Chapman and Hall/CRC Press.

Examples

data(springs)
attach(springs)
plot(cycles~stress)
plot(cycles~stress,log="y")