xmp04.30 {Devore5} | R Documentation |
The xmp04.30
data frame has 10 rows and 1 columns of
lifetimes of power apparatus insulation.
This data frame contains the following columns: describe{ item{lifetime}{ a numeric vector of lifetimes (hr) of power apparatus insulation under thermal and electrical stress. } }
Devore, J. L. (2000) Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury
(1985) "On the estimation of life of power apparatus under combined electrical and thermal stress", IEEE Transactions on Electrical Insulation, 70㫦.
library(Devore5) data(xmp04.30) attach(xmp04.30) ## Try normal probability plot first qqnorm(lifetime, ylab = "Lifetime (hr)") qqline(lifetime) ## Weibull probability plot, compare Figure 4.36, p. 194 plot(log(-log(1 - seq(0.05, 0.95, 0.1))), log(sort(lifetime)), xlab = "Theoretical Quantiles", ylab = "log(Lifetime) (log(hr))", main = "Weibull Q-Q Plot", las = 1) detach()