EMC Proven Professional – Data Science and Big Data Analytics — Question 9

Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
The minimum support is 25%. Which rule has a confidence equal to 50%?

Answer options

• A. {bread, milk} => {cheese}
• B. {bread} => {milk}
• C. {juice} => {soda}
• D. {bread} => {cheese}

Correct answer: A

Explanation

The correct answer is A because the combination of {bread, milk} leads to {cheese} in 50% of the transactions that include both items. The other options either do not meet the required confidence or do not result in {cheese} based on the transactions provided.