sigma
/ˈsɪɡmə/
noun
- The 18th letter of the Greek alphabet (Σ, σ, ς).
- The word 'psychology' starts with the Greek letter psi, not sigma.
- The Greek letter sigma looks like an 'E' but is pronounced 'sig-muh'.
- In math class, we use sigma to represent the sum of a series.
- A symbol (Σ) used in mathematics to denote summation.
- The formula uses sigma to show the total of all numbers from 1 to 10.
- The teacher explained how to read sigma expressions in algebra.
- You can write the sum of a sequence using the sigma notation.
- A statistical measure of standard deviation.
- The engineer calculated the sigma to check the consistency of the product.
- A low sigma value means the data points are close to the average.
- The quality control team uses six sigma methods to reduce errors.