vcd (version 0.1-3.4)

SpaceShuttle: Space Shuttle O-ring failures

Description

Data from Dalal et al. (1989) about O-ring failures in the NASA space shuttle progam. The damage index comes from a discussion of the data by Tufte (1997).

Usage

data(SpaceShuttle)

source

Michael Friendly (2000), Visualizing Categorical Data: http://hotspur.psych.yorku.ca/ftp/sas/vcd/catdata/orings.sas

References

S. Dalal, E. B. Fowlkes, B. Hoadly (1989), Risk analysis of the space shuttle: Pre-Challenger prediction of failure, Journal of the American Statistical Association, 84, 945-957.

E. R. Tufte (1997), Visual Explanations: Images and Quantities, Evidence and Narrative. Graphics Press, Cheshire, CT.

M. Friendly (2000), Visualizing Categorical Data. SAS Institute, Cary, NC.

Examples

data(SpaceShuttle)
plot(nFailures/6 ~ Temperature, xlim = c(30, 81), data = SpaceShuttle,
     ylim = c(0,1), main = "NASA Space Shuttle O-Ring Failures",
     ylab = "Estimated failure probability", pch = 19, col = 4)
fm <- glm(cbind(nFailures, 6 - nFailures) ~ Temperature, data = SpaceShuttle,
          family = binomial)
lines(30:81, predict(fm, data.frame(Temperature = 30:81), type = "re"), lwd = 2)
abline(v = 31, lty = 3)