Which correlation is the strongest?

Which correlation is the strongest? (a) +.10

(b) -.95

(c) +.90

(d) -1.00

✅ Correct option: (d) -1.00

Explanation:

The strength of a correlation depends on the absolute value of the correlation coefficient, not the sign. Correlation coefficients range from -1.00 to +1.00. A value of ±1.00 represents a perfect correlation, meaning the relationship between variables is exact and without error. Among the options, -1.00 represents a perfect negative correlation, where as one variable increases, the other decreases in a perfectly predictable manner. Although +0.90 and -0.95 are very strong correlations, they are not perfect. A correlation of +0.10 is weak and close to zero. In research and statistics, a correlation of ±1.00 is rarely found in real-world data because human behavior and social variables involve many uncontrolled factors. However, theoretically, it is the strongest possible relationship. Therefore, option (d) is correct because it represents the maximum possible strength of correlation.

10 Related PPSC Facts:

Correlation ranges from -1 to +1 Strength depends on absolute value ±1 indicates perfect correlation Negative sign shows inverse relationship Positive sign shows direct relationship Zero means no relationship Pearson’s r measures correlation Perfect correlations are rare in social sciences Scatterplots show correlation visually Correlation does not imply causation