SD Command

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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 \mathrm{\mathsf{ \sqrt{2} }}.
  • SD({-3 + 2 x, -1- 4 x, -2 + 5 x^2}) is evaluated as \mathrm{\mathsf{ \sqrt{2} \frac{\sqrt{25x⁴ + 10x³ + 28x² - 18x + 3} } { 3 } }}.


Note: See also Mean Command.
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