sigma

1. The eighteenth letter of the Classical and Modern Greek alphabets (Σ, σ), the twentieth letter of Old and Ancient.

   Sigma

   си́гмаsígma

   the 18th letter of the Greek alphabet

2. The symbol Σ, used to indicate summation of a set or series.

3. The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.

4. (інтернет)A sigma male (a self-reliant and assertive male).

1. Everybody wants to be a sigma, but nobody wants to be a delta.

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2. Six Sigma is an optimisation of production method developed by Motorola.

   deSix Sigma ist eine Methode zur Produktionsoptimierung, die von Motorola entwickelt wurde.

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