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

Data originally from Christensen, R. and L.~G. Blackwood (1993).``Tests
for precision and accuracy of multiple measuring devices.'' 
{\em Technometrics\/}~{\em 35}, 411--420.

Temperature differences in degrees Celsius between
two thermocouples for 64 consecutive readings.