多項(xiàng)選擇題對(duì)觀測(cè)取得的數(shù)據(jù)進(jìn)行分類時(shí),必須遵循的分類原則有()

A.同質(zhì)性
B.互斥性
C.完備性
D.分散性
E.整齊性


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1.多項(xiàng)選擇題簡(jiǎn)單隨機(jī)樣本的抽樣方式有()

A.抽簽法
B.搖獎(jiǎng)法
C.配對(duì)法
D.配額法
E.隨機(jī)數(shù)表法

2.單項(xiàng)選擇題經(jīng)濟(jì)業(yè)績(jī)指數(shù)的分母為()

A.實(shí)際經(jīng)濟(jì)增長(zhǎng)率
B.通貨膨脹率
C.失業(yè)率
D.痛苦指數(shù)

3.單項(xiàng)選擇題評(píng)價(jià)指標(biāo)經(jīng)過(guò)規(guī)格化變換后,其()

A.取值都在0與1之間
B.均值為0
C.均值為1
D.標(biāo)準(zhǔn)差為1

5.單項(xiàng)選擇題總指數(shù)與相應(yīng)的各個(gè)個(gè)體指數(shù)之間的關(guān)系為()

A.總指數(shù)大于所有的個(gè)體指數(shù)
B.總指數(shù)小于所有的個(gè)體指數(shù)
C.總指數(shù)介于個(gè)體指數(shù)的最大值與最小值之間
D.上述三種情況都可能發(fā)生

最新試題

在組距數(shù)列中,下限就是()

題型:?jiǎn)雾?xiàng)選擇題

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

題型:?jiǎn)雾?xiàng)選擇題

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(wú)變化,則2019年職工總平均工資將()

題型:?jiǎn)雾?xiàng)選擇題

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?()

題型:?jiǎn)雾?xiàng)選擇題

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)?

題型:?jiǎn)柎痤}

最能反映離散程度的指標(biāo)是()

題型:?jiǎn)雾?xiàng)選擇題

If the individual class frequency is divided by the total frequency, the result is the ().

題型:?jiǎn)雾?xiàng)選擇題

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}

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 ().

題型:?jiǎn)雾?xiàng)選擇題

The number of class intervals in a frequency distribution is usually between ().

題型:?jiǎn)雾?xiàng)選擇題