xmp10.03 {Devore6} | R Documentation

## data from Example 10.3

### Description

The `xmp10.03` data frame has 15 rows and 2 columns.

### Format

This data frame contains the following columns:

Soiling
  a numeric vector
Mixture
  a numeric vector

### Details

Data from an experiment comparing the degree of soiling for fabric copolymerized with three different mixtures of methacrylic acid.

### Source

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

(1983), ``Chemical factors affecting soiling and soil release from cotton DP fabric'', American Dyestuff Reporter, 25-30.

### Examples

    data(xmp10.03)
    xmp10.03$Mixture <- factor(xmp10.03$Mixture)
    plot(Soiling ~ Mixture, data = xmp10.03, col = "lightgray",
         main = "Data from Example 10.3")
    summary(xmp10.03)          # check ranges and balance
    fm1 <- lm(Soiling ~ Mixture, data = xmp10.03)
    anova(fm1)                 # compare to table shown on p. 412

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