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ASQ CQE Exam - Topic 2 Question 131 Discussion

The values of two different variables are related to each other such that an increase in the value of the first variable is accompanied by a decrease in the value of the second variable. If the variables are perfectly correlated, their correlation coefficient will be equal to
D) -1.0
A) 2.0
B) 1.0
C) 0.0

ASQ CQE Exam - Topic 2 Question 131 Discussion

Actual exam question for ASQ's CQE exam
Question #: 131
Topic #: 2
[All CQE Questions]

The values of two different variables are related to each other such that an increase in the value of the first variable is accompanied by a decrease in the value of the second variable. If the variables are perfectly correlated, their correlation coefficient will be equal to

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Suggested Answer: D

The correlation coefficient measures the strength and direction of a linear relationship between two variables. A correlation coefficient of -1.0 indicates a perfect negative correlation, meaning that as one variable increases, the other decreases.


Moore, D.S., McCabe, G.P., & Craig, B.A. (2017). Introduction to the Practice of Statistics. W.H. Freeman.

Montgomery, D.C. (2009). Introduction to Statistical Quality Control. Wiley.

by Jerry at Aug 18, 2026, 12:43 AM

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Alease
4 days ago
I’m a bit confused. I thought a correlation of 0.0 meant no relationship at all, but I guess that doesn't apply here.
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Rolande
9 days ago
I remember practicing a question like this, and I believe the answer is D) -1.0 since one variable increases while the other decreases.
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Tracie
14 days ago
I think the correlation coefficient for perfectly negative correlation is -1.0, but I'm not completely sure.
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