问题
填空题
数1,0,2,1,0,2方差是 ▲ .
答案
=(1+2+0+1+0+2)÷6=1,
S2= [(1-1)2+(0-1)2+(2-1)2+(1-1)2+(0-1)2+(2-1)2]=
.
数1,0,2,1,0,2方差是 ▲ .
=(1+2+0+1+0+2)÷6=1,
S2= [(1-1)2+(0-1)2+(2-1)2+(1-1)2+(0-1)2+(2-1)2]=
.