Jawab:
cari dulu nilai rata-rata
nilai frekuensi nilai × frekuensi
3 2 6
4 3 12
5 2 10
6 4 24
7 4 28
8 3 24
9 2 18
--------------------------------------------------------------
Total 20 122
Rata-rata = 122 ÷ 20
= 6,1
Total murid di bawah nilai 6,1 = 2 + 3 + 2 + 4
= 11
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Jawab:
cari dulu nilai rata-rata
nilai frekuensi nilai × frekuensi
3 2 6
4 3 12
5 2 10
6 4 24
7 4 28
8 3 24
9 2 18
--------------------------------------------------------------
Total 20 122
Rata-rata = 122 ÷ 20
= 6,1
Total murid di bawah nilai 6,1 = 2 + 3 + 2 + 4
= 11