Survival Curve

Figure 1. Survival curves by customer category
Survival curves by customer category

The survival curves give a visual representation of the life tables. The horizontal axis shows the time to event. In this plot, drops in the survival curve occur at 3-month intervals, as specified in the dialogs. The vertical axis shows the probability of survival. Thus, any point on the survival curve shows the probability that a customer of a given service category will remain a customer past that time. Total service and Basic service customers appear to have the lowest survival curves, and E-service customers appear to have lower curves than Plus service customers. To determine whether these differences are due to chance, look at the comparisons tables.

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