# Difference between revisions of "SD Command"

From GeoGebra Manual

Noel Lambert (talk | contribs) (correcting the error in the last formula) |
m (Text replace - "<div class="box info"> 48px|left This page is part of the official manual for print and pdf. For structural reasons normal users can't edit this page. If you found any errors on this page please contact ) |
||

Line 1: | Line 1: | ||

− | <noinclude>{{Manual Page|version=4. | + | <noinclude>{{Manual Page|version=4.2}}</noinclude> |

{{command|cas=true|statistics}} | {{command|cas=true|statistics}} | ||

;SD[ <List of Numbers> ] | ;SD[ <List of Numbers> ] |

## Revision as of 21:25, 9 March 2013

- 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[ <List of Numbers>, <List of Frequencies> ]
- Calculates the weighted standard deviation of the given numbers.
**Example:**`SD[{-3 + 2 x, -1- 4 x, -2 + 5 x^2}]`

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

**Note:**See also Mean Command.