Symbols and notation
Sigma symbols
Uppercase sigma commonly denotes a sum, while lowercase sigma commonly denotes standard deviation; context determines the intended quantity.
Common notation Σᵢxᵢ; σ
In one sentence
What does Sigma symbols mean?
Uppercase sigma commonly denotes a sum, while lowercase sigma commonly denotes standard deviation; context determines the intended quantity.
How it is written
Σᵢxᵢ; σ
A compact example
Σᵢ₌₁⁴i=1+2+3+4=10, while σ describes the spread of values around a population mean.
Other names and search terms
Σ, σ, sigma, summation symbol, standard deviation symbol.
Clear answers
Questions about Sigma symbols
What does Sigma symbols mean in mathematics?
Uppercase sigma commonly denotes a sum, while lowercase sigma commonly denotes standard deviation; context determines the intended quantity.
How is Sigma symbols written?
A common notation is Σᵢxᵢ; σ.
What is an example of Sigma symbols?
Σᵢ₌₁⁴i=1+2+3+4=10, while σ describes the spread of values around a population mean.