Question: If r is the sample correlation coefficient for the data pairs (x1, y1), . . . , (xn, yn), then it is also the sample

If r is the sample correlation coefficient for the data pairs (x1, y1), . . . , (xn, yn), then it is also the sample correlation coefficient for the data pairs (a bx1, c dy1), . . . , (a bxn, c dyn) provided that b and d are both positive or both negative

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