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mean 9,0 (rata ratane 90÷10)
median 10 (nilai tengah dari 14,13,12,11,10,10,8,6,4,2 kan 10)
----------------------------------------------- = -----------------------------------------------------
jumlah frekuensi 10 + 8 + 6 + 2 + 4
= 100 + 88 + 72 + 26 + 56 = 342 = 10,40
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30 30
median = tb2 + ( 1/2n - fn )/f . = 1/2.30 - 10 ). = data ke 5 atau 10//
mo = sudah jelas : 10