Uttal
US
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Definitioner
Substantiv
- The name for the eighteenth letter of the Classical and Modern Greek, the twentieth letter of Old and Ancient.
- (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.
Exempel
- 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.
Böjningsformer
| Plural | sigmas |