A.必然事件
B.不可能事件
C.小概率事件
D.大概率事件
您可能感興趣的試卷
你可能感興趣的試題
A.原假設(shè)為真的條件下檢驗統(tǒng)計量的概率分布
B.備擇假設(shè)為真的條件下檢驗統(tǒng)計量的概率分布
C.觀測變量的總體概率分布
D.觀測變量的樣本分布
A.α
B.β
C.1-α
D.1-β
A.θ^的數(shù)值接近于總體參數(shù)θ
B.θ^的期望等于總體參數(shù)θ
C.θ^的方差接近于總體參數(shù)θ
D.θ^的方差接近于總體方差σ2
A.近似等于θ的量
B.隨機變量
C.數(shù)學(xué)期望等于θ的統(tǒng)計量
D.方差固定的統(tǒng)計量
A.正態(tài)分布
B.x2分布
C.t分布
D.均勻分布
最新試題
要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()
Descriptive statistics deals with methods of()
最能反映離散程度的指標(biāo)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 ().
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?
對某班級學(xué)生的生活狀況進(jìn)行統(tǒng)計調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()
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). 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 ().
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()
對全國各鐵路交通樞紐的貨運量、貨物種類等進(jìn)行調(diào)查,以了解全國鐵路貨運概況。這種調(diào)查屬于()
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 approximate range of the number of phone calls arriving each hour?()