Correlation coefficient measures the strength and direction of a linear relationship between two variables
Values range from -1 to +1
1 indicates a perfect positive linear relationship
-1 indicates a perfect negative linear relationship
0 indicates no linear relationship
Values close to +1 indicate a strong positive relationship
Values close to -1 indicate a strong negative relationship
Values near 0 indicate a weak or no linear relationship
The sign shows direction
The absolute value shows strength
Correlation does not imply causation
Interpretation depends on context and field of study
A statistically significant correlation may still be weak in practical terms
A strong correlation may exist without being statistically significant in small samples