Most Commonly Used Measure of Dispersion
The most commonly used measure of dispersion is:
- Standard deviation — Correct Answer
- Range
- Variance
- Mean deviation
Explanation:
Correct Answer: Standard deviation
Standard deviation (SD) is the most commonly used (ideal) measure of dispersion. It is always greater than mean deviation (MD), and the relationship is: SD = 5/4 × MD.
Measures of Dispersion — Summary
| Measure | Key Feature |
|---|---|
| Range | Difference between smallest and largest values; most affected by extreme values; includes 100% of items |
| Mean deviation (MD) | Mean absolute deviation; least affected by extreme values |
| Standard deviation (SD) | Ideal/most commonly used measure; SD = 5/4 × MD; always > MD |
| Variance | Square of standard deviation (SD²) |
| Standard Error (SE) | SD / √N — relative measure |
| Coefficient of variation (CV) | SD / AM × 100 — free from units (relative measure) |
📚 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.
