Pertanyaan

Simpangan rata-rata dari data 5,7,7,12,11,6 adalah ...

2,33
3,23
3,32
5,23
5,32

F. Pratama

Master Teacher

Mahasiswa/Alumni Universitas Putra Indonesia YPTK Padang

Jawaban terverifikasi

Pembahasan

Cari rata-rata terlebih dahulu Sehingga simpangan rata-rata dari data tersebut adalah

$S R equals fraction numerator sum from i equals 1 to n of vertical line x subscript i minus top enclose x vertical line over denominator n end fraction equals fraction numerator vertical line x subscript 1 minus top enclose x vertical line plus midline horizontal ellipsis plus vertical line x subscript n minus top enclose x vertical line over denominator n end fraction$

Cari rata-rata terlebih dahulu

$top enclose x equals fraction numerator 5 plus 7 plus 7 plus 12 plus 11 plus 6 over denominator 6 end fraction equals 48 over 6 equals 8$

Sehingga simpangan rata-rata dari data tersebut adalah

$S R equals fraction numerator vertical line 5 minus 8 vertical line plus vertical line 7 minus 8 vertical line plus vertical line 7 minus 8 vertical line plus vertical line 12 minus 8 vertical line plus vertical line 11 minus 8 vertical line plus vertical line 6 minus 8 vertical line over denominator 6 end fraction S R equals fraction numerator 3 plus 1 plus 1 plus 4 plus 3 plus 2 over denominator 6 end fraction equals 14 over 6 equals 2 comma 33 space$