A.α
B.β
C.1-α
D.1-β
您可能感興趣的試卷
你可能感興趣的試題
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
A.一致性
B.無偏性
C.有效性
D.充分性
A.變量x的標準差
B.變量y的標準差
C.變量x和y兩個標準差的乘積
D.變量x和y的協(xié)方差
最新試題
The number of class intervals in a frequency distribution is usually between ().
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
A cumulative frequency polygon is also called ().
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調(diào)查,以了解全國鐵路貨運概況。這種調(diào)查屬于()
以2000年a0為最初水平,2016年an為最末水平,計算鋼產(chǎn)量的年平均發(fā)展速度時,須開()
某班的學(xué)習(xí)按考試成績分為60分以下,60-70,70-80,80-90,90-100,這種分組()
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 ().
常用的長期趨勢測定的方法有哪些?各有什么特點?
某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組,請指出哪項是正確的()
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 ().