Classical N, P, K Factorial Experiment
A classical N, P, K (nitrogen, phosphate, potassium) factorial experiment on the growth of peas conducted on 6 blocks. Each half of a fractional factorial design confounding the NPK interaction was used on 3 of the plots.
Which block (1 to 6).
Indicator (0/1) for the application of nitrogen.
Indicator (0/1) for the application of phosphate.
Indicator (0/1) for the application of potassium.
Yield of peas, in pounds/plot. Plots were 1/70 acre.
Imperial College, London, M.Sc. exercise sheet.
Venables, W. N. and Ripley, B. D. (2002). Modern Applied Statistics with S. Fourth edition. New York: Springer.
t = octave.dataset.npk; # TODO: Port aov() and LM to Octave