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

Data originally from Swallow, W.~H. and S.~R. Searle (1978).  ``Minimum
variance quadratic unbiased estimation ({MIVQUE}) of variance components.''
{\em Technometrics\/}~{\em 20}, 265--272.

Columns are head number and weight of oil.