A.全距
B.标准差
C.平均差
D.标准差系数
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A.提高
B.下降
C.不变
D.条件不够,无法判断
A.每个组的最小值
B.每个组的最大值
C.全距中的最大值
D.全距中的最小值
A.80%~89%,90%~99%,100%~109%,110%以上
B.80%以下,80.1%~90%,90.1%~100%,100.1%~110%
C.90%以下,90%~100%,100%~110%,110%以上
D.85%以下,85%~95%,95%~100%,105%~115%
A.小于1
B.等于1
C.大于1
D.不等于1
A.普查
B.抽样调查
C.重点调查
D.典型调查
A.年龄
B.学习成绩
C.专业
D.个人爱好
A.是等距分组
B.第一组假定下限是0
C.相邻组限是重叠的
D.分组标志为连续型变量
E.某学生的成绩80分应归在70-80这一组
A.15次方
B.16次方
C.17次方
D.18次方
A.1.2
B.0.8
C.1.25
D.0.83
A.比例相对指标
B.结构相对指标
C.比较相对指标
D.强度相对指标
最新试题
一个地区一定时期的商品零售额属于()
常用的长期趋势测定的方法有哪些?各有什么特点?
A cumulative frequency polygon is also called ().
如果居民按报告期价格购买商品需多支出40万元,报告期商品销售额为200万元,则价格指数为()
If the individual class frequency is divided by the total frequency, the result is the ().
A summary measure that is computed from a sample to describe a characteristic of the population is called()
最能反映离散程度的指标是()
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 cumulative frequency of the third class?()
A cumulative frequency distribution would provide().
One rule that must always be followed in constructing frequency distributions is that ().