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Varians (ragam) dari data 15, 13, 15, 12, 14, 15 adalah ...

$fraction numerator begin display style 9 end style over denominator begin display style 3 end style end fraction$
$fraction numerator begin display style 7 end style over denominator begin display style 3 end style end fraction$
$fraction numerator begin display style 5 end style over denominator begin display style 3 end style end fraction$
$fraction numerator begin display style 4 end style over denominator begin display style 3 end style end fraction$

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$R a t a minus r a t a top enclose X equals fraction numerator j u m l a h space d a t a over denominator b a n y a k space d a t a end fraction top enclose X equals fraction numerator 3 left parenthesis 15 right parenthesis plus 14 plus 13 plus 12 over denominator 6 end fraction equals 84 over 6 equals 14 V a r i a n s colon sigma equals fraction numerator sum from i to n of equals 1 left parenthesis x subscript i minus top enclose X right parenthesis end enclose squared over denominator n end fraction sigma squared equals fraction numerator 3 left parenthesis 15 minus 14 right parenthesis squared plus left parenthesis 14 minus 14 right parenthesis squared plus left parenthesis 13 minus 14 right parenthesis squared plus left parenthesis 12 minus 14 right parenthesis squared equals over denominator 6 end fraction 8 over 6 equals 4 over 3$