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
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
什么是季節(jié)變動(dòng)？研究它的意義何在？如何測定季節(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 （）.
A cumulative frequency distribution would provide（）.
One rule that must always be followed in constructing frequency distributions is that （）.
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 （）.
常用的長期趨勢測定的方法有哪些？各有什么特點(diǎn)？
最能反映離散程度的指標(biāo)是（）
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（）
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）