# SD Command

From GeoGebra Manual

- SD( <List of Numbers> )
- Calculates the standard deviation of the numbers in the list.
**Example:**`SD({1, 2, 3, 4, 5})`

yields*1.41*

- SD( <List of Numbers>, <List of Frequencies> )
- Calculates the weighted
*standard deviation*of the given numbers. **Example:**`SD({20, 40, 41, 42, 40, 54}, {20, 6, 4, 5, 2})`

yields*5.96*

## CAS Syntax

- SD( <List of Numbers> )
- Calculates the
*standard deviation*of the numbers in the list. **Example:**`SD({1, 2, 3, 4, 5})`

yields \sqrt{2}.`SD({-3 + 2 x, -1- 4 x, -2 + 5 x^2})`

is evaluated as \sqrt{2} \frac{\sqrt{25x⁴ + 10x³ + 28x² - 18x + 3} } { 3 } .

**Note:**See also Mean Command.