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Pertanyaan

Simpangan baku data 3, 11, 8, 5, 4, 10, 8, 7 adalah ....

Simpangan baku data 3, 11, 8, 5, 4, 10, 8, 7 adalah ....

  1. begin mathsize 14px style square root of 6 end style

  2. begin mathsize 14px style square root of 7 end style

  3. begin mathsize 14px style square root of 8 end style

  4. 7

  5. 8

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A. Rizky

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

Rata-rata data tersebut: Rumus simpangan baku, Maka,

Rata-rata data tersebut:

begin mathsize 14px style x with minus on top equals fraction numerator 3 plus 11 plus 8 plus 5 plus 4 plus 10 plus 8 plus 7 over denominator 8 end fraction equals 7 end style

Rumus simpangan baku,

begin mathsize 14px style S equals square root of fraction numerator open parentheses x subscript 1 minus x with minus on top close parentheses squared plus horizontal ellipsis plus open parentheses x subscript n minus x with minus on top close parentheses squared over denominator n end fraction end root end style

Maka,

begin mathsize 14px style S equals square root of fraction numerator open parentheses 3 minus 7 close parentheses squared plus open parentheses 11 minus 7 close parentheses squared plus open parentheses 8 minus 7 close parentheses squared plus open parentheses 5 minus 7 close parentheses squared plus open parentheses 4 minus 7 close parentheses squared plus open parentheses 10 minus 7 close parentheses squared plus open parentheses 8 minus 7 close parentheses squared plus open parentheses 7 minus 7 close parentheses squared over denominator 8 end fraction end root  S equals square root of fraction numerator 16 plus 16 plus 1 plus 4 plus 9 plus 9 plus 1 plus 0 over denominator 8 end fraction end root  S equals square root of 56 over 8 end root  S equals square root of 7 end style

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