nlme (version 3.1-130)

Oats: Split-plot Experiment on Varieties of Oats

Description

The Oats data frame has 72 rows and 4 columns.

Format

This data frame contains the following columns:

Source

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York. (Appendix A.15) Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. (4th ed), Springer, New York.

Details

These data have been introduced by Yates (1935) as an example of a split-plot design. The treatment structure used in the experiment was a $3 x 4$ full factorial, with three varieties of oats and four concentrations of nitrogen. The experimental units were arranged into six blocks, each with three whole-plots subdivided into four subplots. The varieties of oats were assigned randomly to the whole-plots and the concentrations of nitrogen to the subplots. All four concentrations of nitrogen were used on each whole-plot.