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?

  • \(0 < r \leq 1\)
  • \(-1 \leq r < 1\)
  • \(-1 < r \leq 0\)
  • \(-1 \leq r \leq 1\) checkmark

The correct answer is: D

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