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letter_disp2|rho|image:Greek_uc_sigma.svg|33pximage:Greek_lc_sigma1.png|30pximage:Greek_lc_sigma2.png|23px |tau|�ίγμα|Σ|�

English
Noun
sigma

1. The name for the eighteenth letter of the Classical Greek|Classical and Modern Greek, the nineteenth letter of Old Greek|Old and Ancient Greek|Ancient.
2. (mathematics): the symbol (Σ) is used to indicate summation of a set or series.
3. (statistics): the symbol (�) is used to indicate one standard deviation from the mean, particularly in a normal distribution.

Translations

Dutch: sigma m
Greek: �ίγμα n
Interlingua: sigma
mid
Portuguese: sigma m
Russian: �игма (sígma) f

Derived terms
within one sigma - the range from the mean, plus or minus one standard deviation, usually covering 68% of the data points in a normal distribution

Category:Greek letters

es:sigma
fr:sigma
gl:sigma
ko:sigma
la:sigma
pl:sigma
ru:sigma
sl:sigma
fi:sigma
vi:sigma

• 2007-09-30 18:54 - UllmannBot - iwiki +es

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