xmp12.08 {Devore6} | R Documentation

## data from Example 12.8

### Description

The `xmp12.08` data frame has 14 rows and 2 columns.

### Format

This data frame contains the following columns:

strength
  fracture strength, as a percentage of the ultimate tensile strength.
attenuat
  attenuation or decrease in the amplitude of the stress wave (neper/cm).

### Details

Data from a study to investigate how the propagation of an ultrasonic stress wave through a substance depends on the properties of the substance. The test substance was fiberglass-reinforced polyester composites.

### Source

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

(1985), ``Promising quantitative nondestructive evaluation techniques for composite materials'', Materials Evaluation, 561-565.

### Examples

    data(xmp12.08)
    plot(attenuat ~ strength, data = xmp12.08,
         xlab = "Fracture strength (% of ultimate tensile strength)",
         ylab = "Attenuation (neper/cm)",
         main = "Data from Example 12.8, page 504")
    fm1 <- lm(attenuat ~ strength, data = xmp12.08)
    abline(fm1)
    summary(fm1)
    opar <- par(mfrow = c(2, 2))
    plot(fm1)
    par(opar)
    anova(fm1)

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