Bartlett data on plum root cuttings
In an experiment to investigate the effect of cutting length (two levels) and planting time (two levels) on the survival of plum root cuttings, 240 cuttings were planted for each of the 2 x 2 combinations of these factors, and their survival was later recorded.
Bartlett (1935) used these data to illustrate a method for testing for no three-way interaction in a contingency table.
data(Bartlett)
A 3-dimensional array resulting from cross-tabulating 3 variables for 960 observations. The variable names and their levels are:
| No | Name | Levels |
| 1 | Alive
|
"Alive", "Dead"
|
| 2 | Time
|
"Now", "Spring"
|
| 3 | Length
|
"Long", "Short"
|
Hand, D. and Daly, F. and Lunn, A. D.and McConway, K. J. and Ostrowski, E. (1994). A Handbook of Small Data Sets. London: Chapman & Hall, p. 15, # 19.
Bartlett, M. S. (1935). Contingency Table Interactions Journal of the Royal Statistical Society, Supplement, 1935, 2, 248-252.
data(Bartlett) fourfold(Bartlett, mfrow=c(1,2)) mosaic(Bartlett, shade=TRUE) pairs(Bartlett, gp=shading_Friendly)
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