xmp13.03 {Devore6} | R Documentation

## data from Example 13.3

### Description

The `xmp13.03` data frame has 12 rows and 2 columns of data on tool lifetime versus cutting time.

### Format

This data frame contains the following columns:

time
  the cutting time (unknown units).
ToolLife
  tool lifetime (unknown units).

### Source

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

(1967) ``The effect of experimental error on the determination of optimum metal cutting conditions'', J. Eng. for Industry, 315–322.

### Examples

    data(xmp13.03)
    plot(ToolLife ~ time, data = xmp13.03)
    plot(ToolLife ~ time, data = xmp13.03, log = "xy")
    fm1 <- lm(log(ToolLife) ~ I(log(time)), data = xmp13.03)
    summary(fm1)
    plot(fm1, which = 1)     # plot of residuals versus fitted values
    plot(exp(fitted(fm1)) ~ xmp13.03$ToolLife,
       xlab = "y", ylab = expression(hat("y")),
       main = "Compare to Figure 13.4, page 555")
    abline(0, 1)       # reference line

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