xmp01.15 {Devore5}R Documentation

data from Example 1.15

Description

The xmp01.15 data frame has 20 rows and 1 columns.

Format

This data frame contains the following columns:

lifetime
a numeric vector of lifetimes (hr) of a certain type of incandescent light bulb.

Source

Devore, J. L. (2000) Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury

Examples

data(xmp01.15)
attach(xmp01.15)
summary(lifetime)              # produces mean, median, etc.
mean(lifetime, trim = 0.1)     # 10% trimmed mean
mean(lifetime, trim = 0.2)     # 20% trimmed mean
dotplot(lifetime)
hist(lifetime)                 # display a histogram
rug(lifetime)                  # add the data
abline(v = median(lifetime), col = 2, lty = 2)
abline(v = mean(lifetime), col = 3, lty = 2)
abline(v = mean(lifetime, trim = 0.1), col = 4, lty = 2)
abline(v = mean(lifetime, trim = 0.2), col = 5, lty = 2)
legend(600, 6,
  c("median", "mean", "10% trimmed mean", "20% trimmed mean"),
  col = 2:5, lty = 2)