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Common terminology is to describe each segment in the tree as a "Node" and each of the end nodes without any children as "leaf nodes".4 Decisions about how to treat someone are based on the properties of the leaf node into which they fall.
Although the tree does not generate a score as such, the score for an individual is usually taken to be the average claim rate (or other value that the tree is used to predict) of the leaf node into which they fall.
In Figure 1.2 the leaf nodes are shaded in grey.
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