Sigma: Difference between revisions
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Revision as of 14:20, 23 October 2012
1. The lower-case Greek letter 'σ' - equivalent to the English small letter 's' - used to designate the standard deviation of a variable.
2. The capital Greek letter 'Σ' - equivalent to the English capital letter 'S' - used to designate the Sum of a selection or series of values.
See also