摘要:7.A 8.C 9.B 10.A 11.D 12.C
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已知样本7,10,14,8,7,12,11,10,8,10,13,10,8,11,8,9,12,9,13,20,那么这组数据落在8.5~11.5的频率为( )
A.0.5 | B.0.4 | C.0.3 | D.0.2 |
已知样本
6 |
8 |
10 |
13 |
10 |
8 |
10 |
11 |
12 |
7 |
8 |
9 |
10 |
11 |
9 |
9 |
12 |
11 |
12 |
12 |
则频率为0.6的范围为
[ ]
A.5.5~13.5 |
B.7.5~11.5 |
C.9.5~13.5 |
D.11.5~13.5 |
已知样本
6 |
8 |
10 |
13 |
10 |
8 |
10 |
11 |
12 |
7 |
8 |
9 |
10 |
11 |
9 |
9 |
12 |
11 |
12 |
12 |
则频率为
0.6的范围为[
]
A .5.5~13.5 |
B .7.5~11.5 |
C .9.5~13.5 |
D .11.5~13.5 |
已知样本
7,10,14,8,7,12,11,10,8,10,13,10,8,11,8,9,12,9,13,20,那么这组数据落在8.5~11.5的频率为( )
A.0.5 | B.0.4 | C.0.3 | D.0.2 |