Pertanyaan

Ragam (variansi) dari data : 6, 8, 6, 7, 8, 7, 9, 7, 7, 6, 7, 8, 6, 5, 8, 7 adalah ...

Ragam (variansi) dari data :

6, 8, 6, 7, 8, 7, 9, 7, 7, 6, 7, 8, 6, 5, 8, 7

adalah ...

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I. Sutiawan

Master Teacher

Mahasiswa/Alumni Universitas Pasundan

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah C

Pembahasan

Diketahui data: 6, 8, 6, 7, 8, 7, 9, 7, 7, 6, 7, 8, 6, 5, 8, 7 maka: Sehingga: Jadi, jawaban yang tepat adalah C

Diketahui data:

6, 8, 6, 7, 8, 7, 9, 7, 7, 6, 7, 8, 6, 5, 8, 7

maka:

$begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row cell top enclose x end cell equals cell fraction numerator sum for blank of x subscript i over denominator n end fraction end cell row blank equals cell fraction numerator 6 plus 8 plus 6 plus 7 plus 8 plus 7 plus 9 plus 7 plus 7 plus 6 plus 7 plus 8 plus 6 plus 5 plus 8 plus 7 over denominator 16 end fraction end cell row blank equals cell 112 over 16 end cell row blank equals 7 end table end style$

Sehingga:

$begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row cell S squared end cell equals cell fraction numerator sum for blank of left parenthesis x subscript i minus x with bar on top right parenthesis squared over denominator n end fraction end cell row blank equals cell fraction numerator left parenthesis 6 minus 7 right parenthesis squared plus left parenthesis 8 minus 7 right parenthesis squared plus left parenthesis 6 minus 7 right parenthesis squared plus left parenthesis 7 minus 7 right parenthesis squared plus.... plus left parenthesis 8 minus 7 right parenthesis squared plus left parenthesis 7 minus 7 right parenthesis squared over denominator 16 end fraction end cell row blank equals cell 16 over 16 end cell row blank equals 1 end table end style$

Jadi, jawaban yang tepat adalah C