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
最新試題
最能反映離散程度的指標(biāo)是()
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()
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()
One rule that must always be followed in constructing frequency distributions is that ().
A cumulative frequency polygon is also called ().
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
Which of the following is not the goal of descriptive statistics?()
One advantage of a stem and leaf plot over a frequency distribution is that ().