Sigma (English)
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Definition (keystage 3)
The Greek letter σ (lower case) or Σ (upper case), equivalent in sound to the English s.
Small sigma can denote the standard deviation of a population. Large sigma is used to denote the sum of certain values of the term that follows.
Small sigma can denote the standard deviation of a population. Large sigma is used to denote the sum of certain values of the term that follows.
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