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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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
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)
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
A.2%
B.0.5%
C.5%
D.4.8%
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
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最新試題
在組距數(shù)列中,下限就是()
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(wú)變化,則2019年職工總平均工資將()
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?()
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)?
最能反映離散程度的指標(biāo)是()
If the individual class frequency is divided by the total frequency, the result is the ().
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)?
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 class intervals in a frequency distribution is usually between ().