Statistics

Dispersion Calculator

Find measures of spread: range, variance, SD and CV.

Value 1

Value 2

Value 3

Value 4

Value 5

Calculated Output

Sample SD 7.906

Sample variance 62.5

Coefficient of variation (%) 52.705

Range 20

Formula: Range, variance, SD and CV from the data

Step-by-Step Breakdown

1. Values used:

2. Value 1 = 5

3. Value 2 = 10

4. Value 3 = 15

5. Value 4 = 20

6. Value 5 = 25

8. Sample SD = 7.906

9. Sample variance = 62.5

10. Coefficient of variation = 52.705%

11. Range = 20

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The math behind it

Range = max − min, variance and SD measure squared spread, and CV = SD ÷ mean × 100 is relative spread.

5, 10, 15, 20, 25 → SD ≈ 7.91, CV ≈ 52.7%.

Which measure should I use?

SD for absolute spread; CV to compare variability across different scales.