In the Greek alphabet, what does 'sigma' look like?

What is the typical use of the capital Sigma (Σ) in mathematics?

If Σ represents a sum, what does Σ (1 to 3) mean?

Besides mathematics, where else might you see the sigma symbol?

In statistics, sigma (σ) often represents what?

If you see Σx, what does the 'x' represent?

Is 'sigma' a commonly used word in everyday conversation?

What letter comes before sigma in the Greek alphabet?

The lowercase sigma (σ) is used in statistics. What is it usually used to represent?

What is the numerical value of Sigma in Six Sigma Methodology?