A.[0.05~0.2]
B.[0.6~0.8]
C.[0.3~0.5]
D.[0.8~0.95]
A.[0.05~0.2]
B.[0.3~0.5]
C.[0.6~0.8]
D.[0.8~0.95]
A.[0.05~0.2]
B.[0.3~0.5]
C.[0.6~0.8]
D.[0.8~0.95]
A.[0.05~0.2]
B.[0.3~0.5]
C.[0.6~0.8]
D.[0.8~0.95]
A.[0.05~0.2]
B.[0.3~0.5]
C.[0.6~0.8]
D.[0.8~0.95]
13 15 14 10 812 13 11
则该样本的样本方差为________