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Question
Can r lie outside the –1 and 1 range depending on the type of data?
Solution
No, the value of r cannot lie outside the range of -1 to 1. If r = -1, then there exists a perfect negative correlation, and if r = 1, then there exists a perfect positive correlation between the two variables. If at any point in time the calculated value of r is outside this range, then there must be some mistake committed in the calculation.
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