A correlation coefficient is an index number falling between the range of:
A) 0 and +1.0
B) 0 and +100
C) -1.0 and +1.0
D) -1.0 and 0
E) -100 and 0

Question

Quizplus · Accepted Answer

A correlation coefficient measures the strength and direction of a linear relationship between two variables, and can range from -1.0 (perfect negative correlation) to +1.0 (perfect positive correlation). Therefore, choice C (-1.0 and +1.0) is the correct range for a correlation coefficient.

A Correlation Coefficient Is an Index Number Falling Between the Range