A.相互關(guān)聯(lián)
B.互不相關(guān)
C.計(jì)量逐步精確
D.方法逐步改進(jìn)
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A.側(cè)檢驗(yàn)
B.左側(cè)檢驗(yàn)
C.雙側(cè)檢驗(yàn)
D.上側(cè)檢驗(yàn)
A.精確假設(shè)
B.非精確假設(shè)
C.復(fù)合假設(shè)
D.備擇假設(shè)
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B.28.59小時
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D.30.02小時
A.變量x的標(biāo)準(zhǔn)差
B.變最y的標(biāo)準(zhǔn)差
C.變量x和y兩標(biāo)準(zhǔn)差的乘積
D.變量x和y的協(xié)方差
A.算術(shù)平均數(shù)
B.中位數(shù)
C.眾數(shù)
D.調(diào)和平均數(shù)
最新試題
時間序列構(gòu)成因素有哪些?分解的基本原理和思路是什么?
某廠某年職工勞動生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()
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 ().
A summary measure that is computed from a sample to describe a characteristic of the population is called()
一個地區(qū)一定時期的商品零售額屬于()
如果居民按報(bào)告期價格購買商品需多支出40萬元,報(bào)告期商品銷售額為200萬元,則價格指數(shù)為()
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組,請指出哪項(xiàng)是正確的()
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
If the individual class frequency is divided by the total frequency, the result is the ().
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%。假定全廠各級工資水平均無變化,則2019年職工總平均工資將()