# Greek Small Letter Sigma

σ
Symbol Format Data
σ Code Point
U+03C3
TeX
\sigma
SVG

## Usage

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

## Related

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

## Links

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.