Rules
The Rules report shows a table of association rules that are sorted in decreasing order of confidences. Only association rules that meet the Minimum Support, Minimum Confidence, Minimum Lift, Maximum Antecedents, and Maximum Rule Size requirements that you specified in the launch window appear in this report.
The Rules report table contains the following columns:
Rule
The association rules formed by combining Condition and Consequent item sets.
Condition
The item set that is thought to influence the presence of a Consequent item set within transactions.
Consequent
The item set whose presence is thought to be influenced by the presence of a Condition item set.
Confidence
The proportion of transactions that contain the Consequent item set, given that the condition item set is in the transaction. Confidence measures the strength of implication, or the predictive power, of an association rule.
Lift
The ratio of an association rule’s confidence to its expected confidence, assuming that the condition and consequent item sets appear in transactions independently. Lift measures how much the Consequent item set depends on the presence of the Condition item set. The minimum value for lift is 0.
– A lift ratio less than 1 indicates that the Condition and Consequent item sets repel each other, because they occur together less frequently than one would expect by chance alone.
– A lift ratio close to 1 indicates that the Consequent item set occurs at the same rate in transactions that contain the Condition item set as one would expect from chance alone.
– A lift ratio greater than 1 indicates that the Consequent item set has an affinity for the Condition item set. The Consequent item set occurs more often with the Condition item set than one would expect by chance alone.