Rule of Thumb for Interpreting the Size of a Correlation ...
Rule of Thumb for Interpreting the Size of a Correlation Coefficient | |
|Size of Correlation |Interpretation |
|.90 to 1.00 (-.90 to –1.00) |Very high positive (negative) correlation |
|.70 to .90 (-.70 to -.90) |High positive (negative) correlation |
|.50 to .70 (-.50 to -.70) |Moderate positive (negative) correlation |
|.30 to .50 (-.30 to -.50) |Low positive (negative) correlation |
|.00 to .30 (.00 to -.30) |Little if any correlation |
Matrix Showing Correlation Coefficients Appropriate for Scales of Measurement for Variable X and Variable Y
| | |Variable X |
| | |Nominal |Ordinal |Interval/Ratio |
|Variable Y |Nominal | | | |
| | |Phi (() |Rank-biserial |Point-biserial |
| | |C coefficient | | |
| | |Cramer’s V | | |
| | |( and (( | | |
| |Ordinal | | | |
| | |Rank-biserial |Tetrachoric |Biseral |
| | | |Spearman ( | |
| |Interval/Ratio | | | |
| | |Point-biserial |Biserial rb |Pearson r |
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