How do you interpret lift in association rules?

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.

How do you interpret lift ratio?

A lift ratio larger than 1.0 implies that the relationship between the antecedent and the consequent is more significant than would be expected if the two sets were independent. The larger the lift ratio, the more significant the association.

How do you interpret association rules?

First, generally on interpretation of association rules. Assuming that 0.3 is support and 0.7 confidence, then the rule is to be read as variable 18x with value 0 (i.e. item 18×0) is with 70\% probability associated with item trt1. In other words, 70\% of transactions containing item 18×0 also contain item trt1.

How do you calculate support in association rule?

Support = (X+Y) total – It is interpreted as fraction of transactions that contain both X and Y.

How do you interpret a lift in market basket analysis?

Overall, lift summarises the strength of association between the products on the left and right hand side of the rule; the larger the lift the greater the link between the two products.

How do you calculate confidence in association rule?

Confidence in a rule is calculated by dividing the probability of the items occurring together by the probability of the occurrence of the antecedent. For example, if B (antecedent) is present, what is the chance that C (consequent) will also be present?

How do you calculate uplift in marketing?

In my book, uplift would be the difference between the actual and the anticipated, related to the anticipated. Assuming seasonality equally effects all markets (by multiplying by 2), the anticipated value of group A is 10, so lift is (5-10)/10=-0.5 (or -50\%). For group B, (15-20)/20=-0.25 (or -25\%).

How is lift CPG calculated?

\% increase in sales (in $ or volume) obtained due to retailer merchandising. Calculated as (Incremental/Base) x 100.

What does an association rule with a lift value of 1?

A lift value near 1 indicates that the rule body and the rule head appear almost as often together as expected, this means that the occurrence of the rule body has almost no effect on the occurrence of the rule head. You can see the lift value of an association rule with IM Visualization.

What is the lift ratio?

The Lift Ratio indicates how likely a transaction will be found where all four book types (Youth, Reference, Geography, and Child) are purchased, as compared to the entire population of transactions. In other words, the Lift Ratio is the Confidence divided by the value for Support for C.

What is the formula for lift in statistics?

P (X,Y)/P (X).P (Y) The Lift measures the probability of X and Y occurring together divided by the probability of X and Y occurring if they were independent events. If X and Y are independent then the Lift == 1.

What is the lift of the rule body?

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.