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What is a good lift value in association rule?
The lift is a value between 0 and infinity: A lift value greater than 1 indicates that the rule body and the rule head appear more often together than expected, this means that the occurrence of the rule body has a positive effect on the occurrence of the rule head.
What is lift association rule?
In data mining and association rule learning, lift is a measure of the performance of a targeting model (association rule) at predicting or classifying cases as having an enhanced response (with respect to the population as a whole), measured against a random choice targeting model.
Which of the following is true of the lift value in association rule?
Its strength is directly proportional to the strength of the association rule. …
What is the lift of an association rule?
the lift is the ratio of the confidence to the expected confidence of an association rule. the confidence of the association rule is 40%. expected confidence in this context means that if { (a, b)} occurs in a transaction that this does not increases the pobability of that { (c)} occurs in this transaction as well.
What is the confidence of the association rule?
The confidence of the rule is 150/200 or 75%. At first sight, this association rule seems very appealing given its high confidence. However, closer inspection reveals that the prior probability of buying coffee equals 900/1000 or 90%. Hence, a customer who buys tea is less likely to buy coffee than a customer about whom we have no information.
The lift, also referred to as the interestingness measure, takes this into account by incorporating the prior probability of the rule consequent as follows: A lift value less (larger) than 1 indicates a negative (positive) dependence or substitution (complementary) effect.
How is the odds ratio similar to lift?
The odds ratio is not as intuitive, but similar in concept to lift. It is the ratio of the odds of X to the odds of Y. Restated, the odds of X is 10.09 times greater than the odds of Y. People generally readily understand lift, so use that whenever possible.