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abstraction > mathematical concept > number > quantity > statistical quantity > standard deviation
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standard deviation
(σ)
subjectfact 
standard deviationhas symbol σ2001-09-27 09:32:32.0
has definition The root mean square deviation from the arithmetic mean.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:32.0
is a kind of statistical quantity2001-09-27 09:32:32.0
quantityhas unit2001-09-27 09:33:12.0
numberhas value2001-09-27 09:32:57.0