Sigma
σ
Type it
| Unicode | U+03C3 | |
|---|---|---|
| LaTeX | \sigma | |
| HTML entity | σ | |
| Character | σ |
Meaning
The lowercase eighteenth letter of the Greek alphabet. In statistics it usually stands for the standard deviation of a population. Compare with Capital Sigma and Mu.
How to read it
σ² = 4
is read “sigma squared equals four”.