tolong di jawab soal ini kk

data diurut : 3,3,5,6,7,7,8,9
mean = ( 2.3+5+6+2.7+8+9 ) / 8
= ( 6 +5 +6 +14 +8 +9) /8
= 48 /8 = 6
varian = sigma dari { (x - medan )^2 / N
= {2(3-6)^2+(5-6)^2+(6-6)^2+2(7-6)^2+(8-6)^2+(9-6)^2 } / 8
= ( 18 + 1+0+2+4+9 ) / 8
= 34/8
= 17/4