Standard deviation
Measure spread using sample or population standard deviation.
How this works
Sum squared deviations, divide by n−1 (sample) or n (population), and take the square root.
Example
Using the example inputs, standard deviation is 1.6329931619.
- Values (comma-separated)
- 2, 4, 4, 6
- Dataset type
- Sample
- Standard deviation
- 1.6329931619
Scope and assumptions
Uses your inputs only; results are rounded for display.
NIST statistical methods handbook