# SampleSD Command

From GeoGebra Manual

- SampleSD( <List of Numbers> )
- Returns sample standard deviation of given list of numbers.
**Example:**`SampleSD[{1, 2, 3}]`

yields*1*.

- SampleSD( <List of Numbers>, <List of Frequencies> )
- Returns the
*standard deviation*of the sample of numbers having the given frequencies. **Example:**`SampleSD[{1, 2, 3, 4, 4},{1, 1, 1, 2}]`

yields*1.08*.

**Hint:**If the list contains undefined variables in the CAS View, the command yields a formula for the

*sample standard deviation*.

**Example:**`SampleSD[{1, 2, a}]`

yields \frac{\sqrt{a²-3a+3}}{\sqrt{3}}.