ex04.82 {Devore6} | R Documentation

## data from exercise 4.82

### Description

The `ex04.82` data frame has 10 rows and 1 columns of bearing lifetimes.

### Format

This data frame contains the following columns:

lifetime
  a numeric vector

### Source

Devore, J. L. (2003) Probability and Statistics for Engineering and the Sciences (6th ed), Duxbury

(1985), "Modified Moment Estimation for the three-parameter Log-normal distribution", Journal of Quality Technology, 92–99.

### Examples

    data(ex04.82)
    attach(ex04.82)
    boxplot(lifetime, ylab = "Lifetime (hr)",
            main = "Bearing lifetimes from exercise 4.82",
            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()

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