SD Command

SD( <List of Numbers> )

Calculates the standard deviation of the numbers in the list.

SD({1, 2, 3, 4, 5}) yields 1.41

stdevp({1, 2, 3, 4, 5}) yields 1.41

SD( <List of Numbers>, <List of Frequencies> )

Calculates the weighted standard deviation of the given numbers.

SD({20, 40, 41, 42, 40, 54}, {20, 6, 4, 5, 2, 1}) yields 10.98

CAS Syntax

SD( <List of Numbers> )

Calculates the standard deviation of the numbers in the list.

  • SD({1, 2, 3, 4, 5}) yields \(\sqrt{2}\).

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

See also Mean Command.