If r denotes the correlation coefficient between two variables, which of the following is always...
FURTHER MATHEMATICS
WAEC 2012
If r denotes the correlation coefficient between two variables, which of the following is always true?
- A. \(0< r \leq 1\)
- B. \(-1 \leq r< 1\)
- C. \(-1< r \leq 0\)
- D. \(-1 \leq r \leq 1\)
Correct Answer: D. \(-1 \leq r \leq 1\)
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