Titanic.survivors.case {CountsEPPM}

Titanic survivors data

Description

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)

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).

Source

Section 9.5, Example 3, pages 263-268, Hilbe, J. (2011).

References

Hilbe, J. (2011). Negative Binomial Regression. Cambridge University Press, second edition.

Examples

data(Titanic.survivors.case)
print(Titanic.survivors.case)