Association Between Variables
Association between two variables is known as-
- Correlation — Correct Answer
- Regression
- Heritability
- Repeatability
Explanation:
Correct Answer: Correlation
Correlation measures the association or degree of relationship between two variables. It tells us how closely two variables are related and in which direction (positive or negative).
Correlation vs Regression — Key Differences
| Feature | Correlation | Regression |
|---|---|---|
| Measures | Association between two variables | Change in one variable per unit change in another |
| Coefficient | r (pure number, no unit) | b (carries unit) |
| Type | Relative measure | Absolute measure |
| Range | −1 to +1 | −∞ to +∞ |
| Symmetry | rxy = ryx | bxy ≠ byx |
| Cause & effect | No cause-effect relationship | Cause & effect relationship present |
Example
- Correlation: Milk yield & fat% are negatively correlated (r = −ve)
- Regression: By increasing age, systolic blood pressure also increases
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
