A.2個(gè)
B.3個(gè)
C.4個(gè)
D.5個(gè)
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A.任意調(diào)查
B.立意調(diào)查
C.配額抽樣
D.整群抽樣
A.名義尺度
B.順序尺度
C.差距尺度
D.比例尺度
A.每個(gè)省的人口
B.每個(gè)縣的人口
C.每個(gè)家庭的人口
D.每個(gè)人
A.專家評(píng)定法
B.層次分析法
C.功效系數(shù)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(biāo)準(zhǔn)差為1
D.均值為1
E.最大值為1
最新試題
某班的學(xué)習(xí)按考試成績分為60分以下,60-70,70-80,80-90,90-100,這種分組()
A cumulative frequency distribution would provide().
One rule that must always be followed in constructing frequency distributions is that ().
某企業(yè)2018年技術(shù)工占50%,2019年新招收了一批學(xué)徒工,使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無變化,則2019年職工總平均工資將()
某廠某年職工勞動(dòng)生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()
A summary measure that is computed from a sample to describe a characteristic of the population is called()
對(duì)全國各鐵路交通樞紐的貨運(yùn)量、貨物種類等進(jìn)行調(diào)查,以了解全國鐵路貨運(yùn)概況。這種調(diào)查屬于()
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ().
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?()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()