| ex04.80 {Devore5} | R Documentation |
The ex04.80 data frame has 10 rows and 1 columns of bearing
lifetimes.
This data frame contains the following columns:
Devore, J. L. (2000) Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury
(1985), "Modified Moment Estimation for the three-parameter Log-normal distribution", Journal of Quality Technology, 9299.
data(ex04.80)
attach(ex04.80)
boxplot(lifetime, ylab = "Lifetime (hr)",
main = "Bearing lifetimes from exercise 4.80",
col = "lightgray")
## Normal probability plot on the original time scale
qqnorm(lifetime, ylab = "Lifetime (hr)", las = 1)
qqline(lifetime)
## Try normal probability plot of the log(lifetime)
qqnorm(log(lifetime), ylab = "log(lifetime) (log(hr))",
las = 1)
qqline(log(lifetime))
detach()