If Data A has a correlation coefficient of r = -0.991, and Data B has a correlation coefficient of r = 0.991, which correlation is correct?
A)Data A and Data B have the same strength in linear correlation.
B)Data A has a stronger linear correlation than Data B.
C)Data A has a weaker linear correlation than Data B.

Question

Quizplus · Accepted Answer

The strength of a linear correlation is determined by the absolute value of the correlation coefficient, r, regardless of its sign. Both Data A and Data B have a correlation coefficient with an absolute value of 0.991, indicating they have the same strength in linear correlation. The sign indicates the direction of the correlation (positive or negative), not the strength.

If Data a Has a Correlation Coefficient of R =