# Sigma Symbol

The Greek letter sigma (σ) is used in statistics to represent the standard deviation of a population of values.

Symbol Format Data
σ Unicode
963

TeX
\sigma
SVG

### Usage

Standard Deviation | Formula

The standard deviation formula is denoted by the greek lower case sigma symbol in the case of the population and the latin letter s for the sample.

Greek Alphabet | Concept

The Greek Alphabet is used throughout math to represent variables, constants, and coeffecients within math expressions, formulas, and equations.

### Related Symbols

Capital Sigma | Symbol

The capital Greek letter Σ (Sigma) is used in algebra to represent the summation operator.