A.总体大小
B.个体多少
C.理论范围
D.具体范围
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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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