PRC-2 · Chapter 10 · Question 50 of 60
If variable X and variable Y exhibit a 'perfect negative correlation', what must be the exact mathematical value of r?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: A) -1
Explanation
A perfect negative correlation signifies that all data points fall perfectly on a downward-sloping straight line, with zero deviation. In statistical terms, this is strictly represented by an r value of exactly -1.
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