Mice Depletion Data
Data from Kastenbaum and Lamphiear (1959). The table gives the number of depletions (deaths) in 657 litters of mice, classified by litter size and treatment. This data set has become a classic in the analysis of contingency tables, yet unfortunately little information on the details of the experiment has been published.
data("Mice")A freqency data frame with 30 observations on the following 4 variables, representing a 5 x 2 x 3 contingency table.
litterlitter size, a numeric vector
treatmenttreatment, a factor with levels A B
deathsnumber of depletions, a factor with levels 0 1 2+
Freqcell frequency, a numeric vector
Goodman, L. A. (1983) The analysis of dependence in cross-classifications having ordered categories, using log-linear models for frequencies and log-linear models for odds. Biometrics, 39, 149-160.
Kastenbaum, M. A. & Lamphiear, D. E. (1959) Calculation of chi-square to calculate the no three-factor interaction hypothesis. Biometrics, 15, 107-115.
data(Mice) # make a table ftable(mice.tab <- xtabs(Freq ~ litter + treatment + deaths, data=Mice)) library(vcd) mosaic(mice.tab, shade=TRUE)
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