A.任意調(diào)查
B.立意調(diào)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(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
A.同度量作用
B.權(quán)數(shù)作用
C.平衡作用
D.基準(zhǔn)作用
E.比較作用
最新試題
變量數(shù)列中,各組頻率之和應(yīng)()
對(duì)全國(guó)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(guó)鐵路貨運(yùn)概況。這種調(diào)查屬于()
為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)?
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?()
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?()
如果居民按報(bào)告期價(jià)格購(gòu)買(mǎi)商品需多支出40萬(wàn)元,報(bào)告期商品銷售額為200萬(wàn)元,則價(jià)格指數(shù)為()
最能反映離散程度的指標(biāo)是()
以2000年a0為最初水平,2016年an為最末水平,計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí),須開(kāi)()
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 ().
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). The average number of absences per employee, calculated from the personnel data of all employees, is a ().