Nilai. :3,4,5,6,7,8,8 Frekuensi:3,8,11,9,7,5,2 Dari data diatas tentukan:a.mean b.median

a.
[tex] \frac{(3 \times 3) + (4 \times 8) + 5 \times 11 + 6 \times 9 + 7 \times 7 + 8 \times 5 + 9 \times 2}{3 + 8 + 11 + 9 + 7 + 5 + 2} [/tex]
[tex] = \frac{9 + 32 + 55 + 54 + 49 + 40 + 18}{45} [/tex]
[tex] = \frac{257}{45} = 5.71[/tex]

b.45÷2=22,5
3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,8,8,8,8,8,9,9
=5+6÷2=5,5

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