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

Data originally from Alley, M.~C., C.~B. Uhl, and M.~M. Lieber (1982).
``Improved detection of drug cytotoxicity in the soft agar colony
formation assay through use of a metabolizable tetrazolium salt.''
{\em Life Sciences\/}~{\em 31}, 3071--3078.

Columns are amount of Cisplatin added (0, .15, 1.5, 15, 150,
or 1500 ng/ml), type of count (conventional or dyed), and
count of viable cell colonies.