Tutorial - Step 7

Evaluation

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Analyze the best rule using the rule node

The best rule extracted from the discovery node should resemble:

IF (Satisfaction 5.97)
AND (DaysConsultancyThisYear 0)
AND (DaysConsultancyLastYear 5)
THEN Response = YES

a = 174, b = 120, c = 119
Accuracy = 68.39, Coverage = 99.17.

The properties a, b and c tells us that the rule fired for 174 records in the database and there are 120 records in the YES class. Of the 174 records for which the rule fired, 119 actually belong to class YES. These properties give us an accuracy of 68% and coverage of 99%. For more details on these terms, see the definitions page.

We also notice that the fields that appear in this rule were also amongst the strongest fields listed in the feature selection results.

 

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