A.任意調查
B.立意調查
C.配額抽樣
D.整群抽樣
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A.名義尺度
B.順序尺度
C.差距尺度
D.比例尺度
A.每個省的人口
B.每個縣的人口
C.每個家庭的人口
D.每個人
A.專家評定法
B.層次分析法
C.功效系數法
D.總和合成法
E.乘積合成法
A.均值為0
B.方差為1
C.標準差為1
D.均值為1
E.最大值為1
A.同度量作用
B.權數作用
C.平衡作用
D.基準作用
E.比較作用
最新試題
A cumulative frequency polygon is also called （）.
某企業(yè)的生產計劃完成百分比采用如下分組，請指出哪項是正確的（）
One rule that must always be followed in constructing frequency distributions is that （）.
Which of the following statements is not true？（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
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？（）
The number of class intervals in a frequency distribution is usually between （）.
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調查，以了解全國鐵路貨運概況。這種調查屬于（）
If the individual class frequency is divided by the total frequency, the result is the （）.