**"SIGMA" means the SUM:**

**The "sum of what?" The sum of a set of values:**

EXAMPLE:

(1 + 2 + 3 + 4 + 5) = 15

**"SIGMA" means the SUM:**

**The "sum of what?" The sum of a set of values:**

EXAMPLE:

(1 + 2 + 3 + 4 + 5) = 15

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What's with the Greek?

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