9.27 Titanic: Survival and age, CHOOSE and FIT.

a. Use a plot to explore whether there is a relationship

between survival and the passenger's age. What do you

conclude from this graph alone?

b. Use software to fit a logistic model to the survival and age

variables to decide whether there is a statistically

significant relationship between age and survival, and if

there is, what its direction and magnitude are. Write the

estimated logistic model using the output and interpret the

output in light of the question.