Nilai= 4,5,6,7,8,9 . Frekuensi=2,7,12,6,2,1. Tentukan mean?

Rata - Rata :
[tex]mean = \frac{x1f1 + .... + xnfn}{f1 + .... + fn} \\ mean = \frac{4 \times 2 + 5 \times 7 + 6 \times 12 + 7 \times 6 + 8 \times 2 + 9 \times 1}{2 + 7 + 12 + 6 + 2 + 1} \\ mean = \frac{8 + 35 + 72 + 42 + 16 + 9}{30} \\ mean = \frac{182}{30} \\ mean = 6 \frac{2}{30} [/tex]
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Mean = 4.2+5.7+6.12+7.6+8.2+9.1 / 2+7+12+6+2+1
= 8+35+72+42+16+9 / 30
= 182 / 30
= 6.06

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