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 

TeX 


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.