Given a rule of the form IF X THEN Y, rule confidence is defined as the conditional probability that
A) Y is true when X is known to be true.
B) X is true when Y is known to be true.
C) Y is false when X is known to be false.
D) X is false when Y is known to be false.

Question

Quizplus · Accepted Answer

Rule confidence is defined as the conditional probability that Y is true given that X is known to be true. It measures the strength of the association between X and Y. Option B talks about the inverse probability and options C and D talk about the complement probabilities, which are not relevant to rule confidence.

Given a Rule of the Form IF X THEN Y