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Varians(ragam) dari data 6, 11, 8, 7, 4, 6 adalah ....

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$top enclose X equals fraction numerator j u m l a h space d a t a over denominator b a n y a k space d a t a end fraction top enclose X equals fraction numerator 6 plus 11 plus 8 plus 7 plus 4 plus 6 over denominator 6 end fraction equals 42 over 6 equals 7 V a r i a n s colon sigma squared equals fraction numerator sum from i equals 1 to n of left parenthesis x subscript i minus top enclose X right parenthesis squared over denominator n end fraction sigma squared equals fraction numerator left parenthesis 6 minus 7 right parenthesis squared plus left parenthesis 11 minus 7 right parenthesis squared plus left parenthesis 8 minus 7 right parenthesis squared plus left parenthesis 7 minus 7 right parenthesis squared plus left parenthesis 4 minus 7 right parenthesis squared plus left parenthesis 6 minus 7 right parenthesis squared over denominator 6 end fraction equals 28 over 6 equals 14 over 3$