Question

Berikut hasil ulangan siswa kelas IX : 6,8,8,9,7,4,10,10,6,6,4,7 ,9,6,5,3,5,4,6,7.
Tentukan mean,median,modus

Answer 1

Data terurut : 3, 4, 4, 4, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, 10, 10
total : 20
mean = ( 3 + 4 + 4 + 4 + 5 + 5 + 6 + 6 + 6 + 6 + 6 + 7 + 7 + 7 + 8 + 8 + 9 + 9 + 10 + 10 ) : 20
mean = ( 7 + 8 + 10 + 12 + 12 + 13 + 14 + 16 + 18 + 20 ) : 20
mean = ( 15 + 22 + 25 + 30 + 38 ) : 20
mean = ( 37 + 55 + 38 ) : 20
mean = 130 : 20 = 6,5
median = 6 + 6 : 2 = 6
modus = 6

Answer 2

Mean : jumlah nilai / banyak siswa
           = (3+4+4+4+5+5+6+6+6+6+6+6+7+7+7+8+8+9+9+10+10) / 20
           = 130 / 20
           = 6,5
median : 6
modus : 6