The data frame
pigment
, a design object, has 60 rows (15 batches
of pigment times 2 samples drawn from each batch times 2 analyses on
each sample) and 4 columns.
B1
through
B15
.
S1
and
S2
.
T1
and
T2
.
Box, G. E., Hunter, W. G.,
and Hunter, S. (1978) Statistics for Experimenters.
J. Wiley and Sons, NY, p. 572.
John M. Chambers and Trevor J. Hastie, (eds.) Statistical Models in S,
Wadsworth and Brooks, Pacific Grove, CA 1992, pg. 160.
praov <- raov(Moisture ~ Batch/Sample, data = pigment)