# Sigma Symbol (σ)

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

Symbol Format Data
σ Unicode
963
TeX
\sigma
SVG

## Usage

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.

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

## Related Symbols

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