Measures of interestingness (e.g., support, confidence, lift) MCQs January 8, 2026November 18, 2024 by u930973931_answers 10 min Score: 0 Attempted: 0/10 Subscribe 1. What does the support metric represent in association rule mining? (A) The proportion of transactions containing only the consequent (B) The proportion of transactions containing the antecedent and consequent (C) The strength of an association rule compared to random chance (D) The likelihood of the antecedent leading to the consequent 2. Which of the following is the formula for support? (A) Support(A→B) = Count of (A ∩ B) / Count of A (B) Support(A→B) = Count of A / Count of B (C) Support(A→B) = Count of (A ∪ B) / Total Transactions (D) Support(A→B) = Total Transactions / Count of A 3. What does the confidence metric measure? (A) The proportion of transactions that contain the antecedent (B) The proportion of transactions containing the consequent (C) The proportion of transactions containing the antecedent in which the consequent also appears (D) The deviation of the rule from independence 4. Which of the following is the formula for confidence? (A) Confidence(A→B) = Support(A∪B) / Support(A) (B) Confidence(A→B) = Support(A) / Support(B) (C) Confidence(A→B) = Support(A∩B) / Support(A) (D) Confidence(A→B) = Support(A∩B) / Support(B) 5. What does a confidence value of 1 indicate? (A) AAA and BBB are completely independent (B) BBB always occurs when AAA occurs (C) AAA never occurs without BBB (D) AAA and BBB are negatively associated 6. What is the lift metric used for? (A) To measure how much more likely AAA and BBB occur together than by chance (B) To measure the frequency of an itemset in the dataset (C) To measure the reliability of an association rule (D) To filter out infrequent itemsets 7. Which of the following is the formula for lift? (A) Lift(A→B) = Confidence(A→B) / Support(B) (B) Lift(A→B) = (Support(A) ⋅ Support(B)) / Support(A∩B) (C) Lift(A→B) = Support(A) / Support(A∩B) (D) Lift(A→B) = Support(A∩B) / (Support(A) ⋅ Support(B)) 8. What does a lift value of 1 indicate? (A) AAA and BBB are positively correlated (B) AAA always leads to BBB (C) AAA and BBB are completely independent (D) AAA and BBB are negatively correlated 9. What does a lift value greater than 1 imply? (A) AAA and BBB are negatively associated (B) AAA and BBB are independent (C) AAA and BBB are more likely to occur together than expected by chance (D) AAA and BBB are rare in the dataset 10. Which of the following measures is primarily used to filter out infrequent itemsets? (A) Lift (B) Confidence (C) Support (D) Conviction