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

Data originally from Sahrmann, H.~F., G.~F. Piepel, and J.~A. Cornell (1987).
In search of the optimum Harvey Wallbanger recipe via mixture experiment
techniques.'' {\em The American Statistician\/}~{\em 41}, 190--194.

Columns are proportions of Galliano, vodka, and orange juice
and the appeal.