摘要:A.24.5-26.5 B.26.5-28.5 C.28.5-30.5 D.30.5-32.5
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已知一个样本:23,24,25,26,26,27,27,27,27,27,28,28,28,29,29,30,30,31,31,32,那么频数为8的范围是
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A.24.5~26.5
B.26.5~28.5
C.28.5~30.5
D.30.5~32.5
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B.26.5~28.5
C.28.5~30.5
D.30.5~32.5
已知一组数据含有20个数据:28,29,30,26,28,25,24,25,29,22,27,26,25,27,23,25,24,21,25,26.如果分成五组,落在24.5~26.5这一小组的频率为
- A.0.04
- B.0.5
- C.0.45
- D.0.4