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

Data originally from Quinlan, J. (1985).  ``Product improvement by
application of Taguchi methods.  In {\em American Supplier Institute
News (special symposium ed.)}, pp. 11--16. Dearborn, MI: American Supplier Institute.

 Levels of factors A, B, C, D, E, F, G, H, J, K, L, M, N,
 O, P, and the response (shrinkage).