Question

Nilai : 6 | 7 | 8 | 9 | 10
Frekuensi : 7 | 6 | 3n + 2 | 6 | n - 1

Jika banyak data 40, maka rata-ratanya adalah…

Answer 1

40 = 7+6+3n+2+6+n-1
20 = 4n
n = 5
frekuensi nilai 8 = 3n+2 = 3(5)+2 = 17
frekuensi nilai 10 = n-1 = 5-1 = 4
rata-rata = 6*7+7*6+8*17+9*6+10*4/ 40 = 7,85