Pertanyaan

Varian (ragam) dari data 6, 9, 7, 5, 4, 5 adalah ....

1,33
1,50
1,60
2,37
2,67

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F. Pratama

Master Teacher

Mahasiswa/Alumni Universitas Putra Indonesia YPTK Padang

Jawaban terverifikasi

Pembahasan

$Varians space equals space straight S squared equals space fraction numerator sum from straight i equals 1 to straight n of left parenthesis straight x subscript straight i minus straight x with bar on top right parenthesis squared over denominator straight n end fraction equals fraction numerator left parenthesis straight x subscript 1 minus straight x with bar on top right parenthesis squared plus... plus left parenthesis straight x subscript straight n minus straight x with bar on top right parenthesis squared over denominator straight n end fraction Cari space rata minus rata space terlebih space dahulu straight x with bar on top equals fraction numerator 6 plus 9 plus 7 plus 5 plus 4 plus 5 over denominator 6 end fraction straight x with bar on top equals 36 over 6 straight x with bar on top equals 6 Sehingga straight S squared equals fraction numerator left parenthesis 6 minus 6 right parenthesis squared plus left parenthesis 9 minus 6 right parenthesis squared plus left parenthesis 7 minus 6 right parenthesis squared plus left parenthesis 5 minus 6 right parenthesis squared plus left parenthesis 4 minus 6 right parenthesis squared plus left parenthesis 5 minus 6 right parenthesis squared over denominator 6 end fraction straight S squared equals fraction numerator 0 plus 9 plus 1 plus 1 plus 4 plus 1 over denominator 6 end fraction straight S squared equals 16 over 6 straight S squared equals 2 comma 67$