These data are from the survival log of the Titanic and consist of the number of survivors out of the number of passengers broken down into age, sex and class categories.
Usage
data(Titanic.survivors.case)
Arguments
Format
A data frame with 12 observations on the following 5 variables.
age
a factor with levels child adult
sex
a factor with levels female male
class
a factor with levels 1st class 2nd class 3rd class
cases
a numeric vector
survive
a numeric vector
Details
Hilbe (2011) first models these data as a logistic model, then finding that they are overdispersed, modeling them as count data (number of survivors, survive) with offset (log of the number of passengers, cases).
References
Hilbe, J. (2011). Negative Binomial Regression. Cambridge University Press, second edition.