Question

Nilai ulangan Matematika kelas VI
6, 8, 7, 7, 6, 6, 6, 7, 7, 8 9, 8, 7, 7, 6, 7, 9, 7, 7, 7
9, 6, 6, 7, 8, 9, 8, 7, 8, 9 9, 6, 6, 10, 9, 8, 8, 7, 9, 9

Nilai rata-rata dari data di atas adalah ....