IBM Planning Analytics V2.0 Developer — Question 21

What is the formula for precision in a classification system?

Answer options

• A. True Negatives / (True Positives + False Positives)
• B. True Positives / (True Positives + False Positives)
• C. False Positives / (True Negatives + False Positives)
• D. True Positives / (True Positives + False Negatives)

Correct answer: C

Explanation

The correct formula for precision is B: True Positives / (True Positives + False Positives), which measures the accuracy of positive predictions. Option A measures specificity, option C incorrectly represents precision, and option D calculates recall instead of precision.