abrasion {faraway} | R Documentation |
The composite
data frame has 16 rows and 4 columns.
Four materials were fed into a wear testing machine
and the amount of wear recorded. Four samples could be processed
at the same time and the position of these samples may be important.
A Latin square design was used.
data(abrasion)
This data frame contains the following columns:
run
position
material
wear
The Design and Analysis of Industrial Experiments by O. Davies, 1954, published by Wiley