A.線性函數(shù)依存關(guān)系
B.確定性的數(shù)量依存關(guān)系
C.非線性函數(shù)依存關(guān)系
D.非確定性的數(shù)量依存關(guān)系
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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)
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)
A.28.35小時(shí)
B.28.59小時(shí)
C.29.61小時(shí)
D.30.02小時(shí)
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
最新試題
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?()
A cumulative frequency distribution would provide().
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)?
A cumulative frequency polygon is also called ().
If the individual class frequency is divided by the total frequency, the result is the ().
對(duì)全國(guó)各鐵路交通樞紐的貨運(yùn)量、貨物種類(lèi)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()
Which of the following statements is not true?()
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
變量數(shù)列中,各組頻率之和應(yīng)()
One rule that must always be followed in constructing frequency distributions is that ().