Encyclopedia > Standard deviation

  Article Content

Standard deviation

In probability and statistics, the standard deviation, generally denoted σ ('sigma'), is the most commonly used measure of statistical dispersion which is measured with the same units as the data. It is calculated as the square root of the variance and is therefore always a non-negative number.

The standard deviation of a sample, as opposed to a population, is denoted s.

See also: mean, skewness, kurtosis, raw score, standard score.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
North Lindenhurst, New York

... are married couples living together, 12.2% have a female householder with no husband present, and 21.9% are non-families. 17.7% of all households are made up of ...

 
 
 
This page was created in 36.6 ms