SD Command
From GeoGebra Manual
Revision as of 14:26, 16 July 2013 by MagdalenaSophieF (talk  contribs)
 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 $\frac{\sqrt{25x⁴ + 10x³ + 28x²  18x + 3} \; \sqrt{2} } { \; 3 \; }$.

 Note:See also Mean Command.