A data set from Oehlert (2000) \emph{A First Course in Design and
Analysis of Experiments}, New York: W. H. Freeman.

Data for a 2^7 in standard order.  Factors are size of image, shape of
image, color of image, orientation of image, duration of image,
vertical location of image, and horizontal location of image.
ABCD, ACEG, BCE, BCFG, ACF, CDEF, ABG, BDEG, ADE, ADFG, BDF, EFG, CDG,
ABEF, and ABCDEFG are confounded with blocks.
Columns are block, A, B, C, D, E, F, G, and response