Program Management Professional (PgMP) — Question 227

What quality control chart compares two or more variables over time to determine how closely the variables may be related to one another?

Answer options

• A. Run chart
• B. Scatter diagram
• C. Control chart
• D. Pareto diagram

Correct answer: B

Explanation

The Scatter diagram is the correct answer because it visually represents the correlation between two variables over time. A Run chart tracks a single variable over time, a Control chart monitors process variation, and a Pareto diagram is used to identify the most significant factors in a dataset.