lme4 (version 0.9975-13)

cake: Breakage angle of chocolate cakes

Description

Data on the breakage angle of chocolate cakes made with different recipes and baked at different temperatures.

Usage

data(cake)

source

Original data given in Cochran and Cox (1957).

Details

The replicate factor is nested within the branch factor.

References

Also cited in Lee, Nelder and Pawitan (2006)

Examples

str(cake)
print(fm1 <- lmer(angle ~ recipe * temperature + (1|replicate/batch), cake,
             method = "ML"), corr = FALSE)
print(fm2 <- lmer(angle ~ recipe + temperature + (1|replicate/batch), cake,
             method = "ML"), corr = FALSE)
print(fm3 <- lmer(angle ~ recipe + as.numeric(temperature) +
             (1|replicate/batch), cake, method = "ML"), corr = FALSE)
anova(fm3, fm2, fm1)

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