Fig. 2
From: Combining EEG signal processing with supervised methods for Alzheimer’s patients classification

C4.5 tree for HC vs MCI of size 7 with 4 leaves. Each path from the root to a leaf represents a classification rule. Each leaf is associated to a class and two numbers. The first number is the total number of instances recognized by the rule, while the second optional number represents how many ones (if any) are misclassified