Variance Command

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.

Examples:

• Variance[{1, 2, a}] yields \frac{2 a^{2} - 6 a + 6}{9}.
• Variance[{1, 2, a} {20, 3, 1}] yields \frac{2 \; a² - 52 \; a + 632}{9}