xmp01.15 {Devore6} | 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. (2003) Probability and Statistics for Engineering and the Sciences (6th 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
    dotchart(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)

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