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

Data originally from Table 1 of Bruce Welch (1996) "Effects of Humidity
on Storing Big Sagebrush Seed", USDA Forest Service, Intermountain
Research Station, Research Paper INT-RP-493.

Sixtythree batches of 300 seeds (big sagebrush, Hobble Creek var.)
are divided into 21 groups of three.  These batches are subjected
to storage for either 0, 60, 120, 180, 240, 300, or 360 days at
0, 32, or 45 percent relative humidity.  After storage, the seeds
are planted.  The response is the percent viable seeds.  Column
1 is storage, column 2 is humidity, and column 3 is percent
viability.