Suppose that the confidence of an association rule is 0.75 and the total number of transactions is 250. How many of those transactions support the consequent if the lift ratio is 1.875?
A)100
B)125
C)150
D)175

Question

Quizplus · Accepted Answer

The lift ratio is the ratio of the observed support to the expected support. If the lift ratio is 1.875, then the observed support is 1.875 times the expected support. The expected support is the support of the consequent divided by the total number of transactions. Therefore, the support of the consequent is 1.875 * (250 / 0.75) = 625.

Suppose That the Confidence of an Association Rule Is 0