xmp11.12 {Devore5}R Documentation

data from Example 11.12

Description

The xmp11.12 data frame has 36 rows and 4 columns.

Format

This data frame contains the following columns:

abrasion
a numeric vector
row
a numeric vector
column
a numeric vector
humidity
a numeric vector

Details

Source

Devore, J. L. (2000) Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury

(1946), ``The abrasion of leather'', J. Inter. Soc. Leather Trades' Chemists, 287.

Examples

data(xmp11.12)
xmp11.12$row <- ordered(xmp11.12$row)
xmp11.12$column <- ordered(xmp11.12$column)
xmp11.12$humidity <- ordered(xmp11.12$humidity)
attach(xmp11.12)  # to check the design
table(row, column)
table(row, humidity)
table(humidity, column)
detach()
fm1 <- lm(abrasion ~ row + column + humidity, xmp11.12)
anova(fm1)    # compare with Table 11.9, page 464

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