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
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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
A.近似等于θ的量
B.隨機(jī)變量
C.數(shù)學(xué)期望等于θ的統(tǒng)計(jì)量
D.方差固定的統(tǒng)計(jì)量
最新試題
為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)?
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?()
常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些?各有什么特點(diǎn)?
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組,請(qǐng)指出哪項(xiàng)是正確的()
A cumulative frequency distribution would provide().
A summary measure that is computed from a sample to describe a characteristic of the population is called()
Which of the following statements is not true?()
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?()
在組距數(shù)列中,下限就是()
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()