GAD (version 1.1.1)

snails: Dataset - Growth rates of snails on large boulders on different rock shores.

Description

This design was extracted from Underwood (1997) but data are artificial. Snails were transplanted from origin to different shores. Several boulders were used on each shore. Cages with snail of each origin on each boulder were replicated. All factors (origin, shore, boulder and cage) are random.

Usage

data(snails)

Arguments

Format

A data frame with 240 observations on the following 6 variables.
origin
a random factor with levels O1 O2
shore
a random factor with levels S1 S2 S3 S4 orthogonal to origin
boulder
a random factor with levels B1 B2 B3 nested in shore
cage
a random factor with levels C1 C2 nested in the combination of boulder and origin
replicate
Sample size
growth
response variable

References

Underwood, A.J. 1997. Experiments in Ecology: Their Logical Design and Interpretation Using Analysis of Variance. Cambridge University Press, Cambridge.

Examples

Run this code
data(snails)

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