Moisture Content of Pigments Experiment

SUMMARY:

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.

ARGUMENTS:

Batch
factor naming one of 15 batches of pigment, B1 through B15 .
Sample
factor specifying one of two samples (from any batch). Levels are: S1 and S2 .
Test
factor specifying one of two analyses (run on any sample). Levels are: T1 and T2 .
Moisture
numeric vector giving the outcome variable, the moisture content of the sample.

SOURCE:

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.

EXAMPLES:

praov <- raov(Moisture ~ Batch/Sample, data = pigment)