單項(xiàng)選擇題對(duì)某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()

A.年齡
B.學(xué)習(xí)成績(jī)
C.專業(yè)
D.個(gè)人愛(ài)好


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1.多項(xiàng)選擇題某班的學(xué)習(xí)按考試成績(jī)分為60分以下,60-70,70-80,80-90,90-100,這種分組()

A.是等距分組
B.第一組假定下限是0
C.相鄰組限是重疊的
D.分組標(biāo)志為連續(xù)型變量
E.某學(xué)生的成績(jī)80分應(yīng)歸在70-80這一組

4.單項(xiàng)選擇題品合格率指標(biāo)是()

A.比例相對(duì)指標(biāo)
B.結(jié)構(gòu)相對(duì)指標(biāo)
C.比較相對(duì)指標(biāo)
D.強(qiáng)度相對(duì)指標(biāo)

5.單項(xiàng)選擇題某廠某年職工勞動(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.比例相對(duì)數(shù)
B.計(jì)劃完成相對(duì)數(shù)
C.強(qiáng)度相對(duì)數(shù)
D.動(dòng)態(tài)相對(duì)數(shù)

最新試題

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)()

題型:?jiǎn)雾?xiàng)選擇題

企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)四個(gè)車間,這四個(gè)車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?

題型:?jiǎn)柎痤}

如果居民按報(bào)告期價(jià)格購(gòu)買商品需多支出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()

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A cumulative frequency polygon is also called ().

題型:?jiǎn)雾?xiàng)選擇題

One rule that must always be followed in constructing frequency distributions is that ().

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Descriptive statistics deals with methods of()

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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?()

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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()

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什么是季節(jié)變動(dòng)?研究它的意義何在?如何測(cè)定季節(jié)變動(dòng)?

題型:?jiǎn)柎痤}

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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a ().

題型:?jiǎn)雾?xiàng)選擇題