PlantGrowth
Results from an Experiment on Plant Growth
Results from an experiment to compare yields (as measured by dried weight of plants) obtained under a control and two different treatment conditions.
- Keywords
- datasets
Usage
PlantGrowth
Format
A data frame of 30 cases on 2 variables.
[, 1] | weight |
numeric | [, 1] |
group
are ctrl, trt1, and trt2.
Source
Dobson, A. J. (1983) An Introduction to Statistical Modelling. London: Chapman and Hall.
Examples
library(datasets)
## One factor ANOVA example from Dobson's book, cf. Table 7.4:
require(stats); require(graphics)
boxplot(weight ~ group, data = PlantGrowth, main = "PlantGrowth data",
ylab = "Dried weight of plants", col = "lightgray",
notch = TRUE, varwidth = TRUE)
anova(lm(weight ~ group, data = PlantGrowth))
Community examples
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