veneer {asbio} | R Documentation |
Four examples of each of five brands of a synthetic wool veneer material were subjected to a friction test and a measure of wear was determined for each experimental unit.
data(veneer)
A data frame with 20 observations on the following 2 variables.
wear
a numeric vector
brand
a factor with levels ACME
AJAX
CHAMP
TUFFY
XTRA
Littell, R. C., Stroup, W. W., and R. J. Freund (2002) SAS for Linear Models. John Wiley and Associates.