What value indicates a strong positive correlation?

What value indicates a strong positive correlation?

• A. 0
• B. 0.5
• C. -0.9
• D. 0.9

Answer: (D)

The idea being tested is how strong a linear relationship is, and in which direction it goes. The correlation coefficient r ranges from -1 to 1. The sign shows direction: positive means as one variable goes up, the other tends to go up; negative means one goes up while the other goes down. The magnitude shows strength: values near 1 or -1 indicate a strong relationship, while values near 0 indicate little or no linear relationship. A value of 0.9 is a high positive value, meaning a very strong upward (positive) linear relationship. The other options either indicate no relationship (0), a moderate positive relationship (0.5), or a strong negative relationship (-0.9), which is not positive. So 0.9 best indicates a strong positive correlation.

The idea being tested is how strong a linear relationship is, and in which direction it goes. The correlation coefficient r ranges from -1 to 1. The sign shows direction: positive means as one variable goes up, the other tends to go up; negative means one goes up while the other goes down. The magnitude shows strength: values near 1 or -1 indicate a strong relationship, while values near 0 indicate little or no linear relationship. A value of 0.9 is a high positive value, meaning a very strong upward (positive) linear relationship. The other options either indicate no relationship (0), a moderate positive relationship (0.5), or a strong negative relationship (-0.9), which is not positive. So 0.9 best indicates a strong positive correlation.