sigma
Pronunciation
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Pronunciation
- IPA: /ˈsɪɡmə/
sigma (plural sigmas)
- The eighteenth letter of the Classical and Modern Greek alphabets, the twentieth letter of Old and Ancient.
- "Herodotus: On The Customs of the Persians" ↗, I.139:
- Their names, which are expressive of some bodily or mental excellence, all end with the same letter---the letter which is called San by the Dorians, and Sigma by the Ionians.
- "Herodotus: On The Customs of the Persians" ↗, I.139:
- (mathematics) The symbol Σ, used to indicate summation of a set or series.
- (statistics) The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.
- 2011, Paul Rincon, (bbc.co.uk) LHC: Higgs boson 'may have been glimpsed' ↗
- None of the spikes seen by the experiments is at much more than the "two sigma" level of certainty.
A level of "five sigma" is required to claim a discovery, meaning there is less than a one in a million chance the data spike is down to a statistical fluke.
- None of the spikes seen by the experiments is at much more than the "two sigma" level of certainty.
- 2011, Paul Rincon, (bbc.co.uk) LHC: Higgs boson 'may have been glimpsed' ↗
This text is extracted from the Wiktionary and it is available under the CC BY-SA 3.0 license | Terms and conditions | Privacy policy 0.003