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modus = (datum ke 20:2 + (20:2+1))/2 => (datum ke 10 + 11)/2 =>
kuartil bawah = (datum ke 5 + 6)/2 => (50+50)/2 => 100/2 = 50
kuartil atas = (datum ke 15 + 16)/2 => (80+80)/2 => 160/2 = 80
jangkauan = nilai terbesar - nilai terkecil => 100 - 30 = 70
jangkauan interkuartil = Q3-Q1= 80 - 50 = 30