Respuesta :
the lift ratio of an association rule with a confidence value of 0.45 and in which the consequent occurs in 4 out of 10 cases is 0.18.
lift ratio= confidence /(support of consequent ⁄ total number of transactions)
We are given,
confidence= 0.45
support of consequent/total number of transactions= 4/10
lift ratio = 0.45/(4/10) = 0.18
a lift ratio larger than 1.0 implies that the connection between the antecedent and the ensuing is extra considerable than could be predicted if the 2 sets were impartial. the larger the raise ratio, the greater sizeable the association.
The 1/3 degree known as the lift or raise ratio is the ratio of self-assurance to anticipated self-belief. expected self-assurance is confidence divided by using the frequency of B. The raise tells us how plenty higher a rule is at predicting the end result than simply assuming the result in the first region. it's far normally considered that elevated ratios higher than 1 suggest strong association among objects. lift ratios underneath 1 imply that the objects aren't possible to be sold collectively.
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