xmp11.12 {Devore5} | R Documentation |
The xmp11.12
data frame has 36 rows and 4 columns.
This data frame contains the following columns:
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.
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