A.演绎推理
B.完全归纳推理
C.不完全归纳推理
D.非逻辑推理
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A.总体大小
B.个体多少
C.理论范围
D.具体范围
A.概念
B.数值
C.概念和数值
D.数值尺度
A.单值
B.等距分组
C.异距分组
D.复合分组
A.各个个体的名称与指标数值
B.各组变量值与次数
C.各组变量值与其方差
D.各组均值与方差
A.简单随机抽样
B.系统抽样
C.分层抽样
D.整群抽样
A.必须相同
B.必须不同
C.可以相同,也可以不同
D.完全没有关系
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The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour?()
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Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
在组距数列中,下限就是()
Descriptive statistics deals with methods of()
最能反映离散程度的指标是()
If the individual class frequency is divided by the total frequency, the result is the ().
要了解某地区全部大学生的就业情况,那么()
A summary measure that is computed from a sample to describe a characteristic of the population is called()