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Varians (ragam) dari data 8, 5, 6, 9, 8, 6 adalah ....

Varians (ragam) dari data 8, 5, 6, 9, 8, 6 adalah ....

  1. 1,6

  2. 2

  3. 3,8

  4. 4

  5. 5,6

Jawaban:

Cari rata-rata terlebih dahulu

top enclose x equals fraction numerator 8 plus 5 plus 6 plus 9 plus 8 plus 6 over denominator 6 end fraction equals 7

Mencari varians

S squared equals fraction numerator sum for left parenthesis x subscript i minus top enclose x right parenthesis squared of over denominator n end fraction  S squared equals fraction numerator left parenthesis 8 minus 7 right parenthesis squared plus left parenthesis 5 minus 7 right parenthesis squared plus left parenthesis 6 minus 7 right parenthesis squared plus left parenthesis 9 minus 7 right parenthesis squared plus left parenthesis 8 minus 7 right parenthesis squared plus left parenthesis 6 minus 7 right parenthesis squared over denominator 6 end fraction  S squared equals fraction numerator 1 squared plus left parenthesis negative 2 right parenthesis squared plus 1 squared plus 2 squared plus 1 squared plus left parenthesis negative 1 right parenthesis squared over denominator 6 end fraction  S squared equals fraction numerator 1 plus 4 plus 1 plus 4 plus 1 plus 1 over denominator 6 end fraction equals 2

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