A.屬性化
B.數(shù)量化
C.同質(zhì)化
D.差異化
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A.等于0
B.等于總平方和
C.完全由觀測(cè)的隨機(jī)誤差引起
D.完全由各因子水平的差異引起
A.必然事件
B.不可能事件
C.小概率事件
D.大概率事件
A.原假設(shè)為真的條件下檢驗(yàn)統(tǒng)計(jì)量的概率分布
B.備擇假設(shè)為真的條件下檢驗(yàn)統(tǒng)計(jì)量的概率分布
C.觀測(cè)變量的總體概率分布
D.觀測(cè)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
最新試題
Descriptive statistics deals with methods of（）
One rule that must always be followed in constructing frequency distributions is that （）.
對(duì)某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
什么是季節(jié)變動(dòng)？研究它的意義何在？如何測(cè)定季節(jié)變動(dòng)？
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
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 （）.
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
A cumulative frequency distribution would provide（）.
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？（）
品合格率指標(biāo)是（）