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Varians

Varians är ett spridningsmått, och definieras som kvadraten av standardavvikelsen.

$Varians = \frac{( x _{1} - μ ) ^{2} + ( x _{2} - μ ) ^{2} + \dots + ( x _{n} - μ ) ^{2}}{n}$

$μ$ är medelvärdet, $x$ är datapunkterna och $n$ är antalet punkter.

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