Variance Command

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Variance( <List of Raw Data> )
Calculates the variance of list elements.
Example: Variance({1, 2, 3}) yields 0.67.
Variance( <List of Numbers>, <List of Frequencies> )
Calculates the variance of list elements, considering the frequencies.
Example: Variance({1, 2, 3} , {1, 2, 1}) yields 0.5.

CAS Syntax

Variance( <List of Numbers> )
Calculates the variance of list elements. If the list contains undefined variables, it yields a formula for the variance.
Example: Variance({1, 2, a}) yields \mathrm{\mathsf{ \frac{2}{9} a^{2} - \frac{2}{3} a + \frac{2}{3} }}.
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