單項(xiàng)選擇題

五位部門(mén)經(jīng)理的年收入如表:

要描述五位部門(mén)經(jīng)理的年收入的一般水平, 用()來(lái)測(cè)度這一集中趨勢(shì)比較合適。 

A.眾數(shù)
B.中位數(shù)
C.平均數(shù)
D.極差


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3.單項(xiàng)選擇題若隨機(jī)事件A與B滿(mǎn)足條件PAB=PAPB,則()

A.A與B相互獨(dú)立
B.A與B不獨(dú)立
C.A與B相互排斥
D.A與B相關(guān)

4.單項(xiàng)選擇題統(tǒng)計(jì)學(xué)的兩大基本內(nèi)容是()

A.統(tǒng)計(jì)資料的收集和分析
B.理論統(tǒng)計(jì)和運(yùn)用統(tǒng)計(jì)
C.統(tǒng)計(jì)預(yù)測(cè)和決策
D.描述統(tǒng)計(jì)和推斷統(tǒng)計(jì)

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