某汽車交易市場共發(fā)生了150項(xiàng)交易,將銷售記錄按付款方式及汽車類型加以區(qū)分如下:
如果從銷售記錄中隨機(jī)抽取一項(xiàng),該項(xiàng)是分期付款的概率是()
A.0.95
B.0.5
C.0.8
D.0.25
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五位部門經(jīng)理的年收入如表:
要描述五位部門經(jīng)理的年收入的一般水平, 用()來測度這一集中趨勢比較合適。
A.眾數(shù)
B.中位數(shù)
C.平均數(shù)
D.極差
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)
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)測和決策
D.描述統(tǒng)計(jì)和推斷統(tǒng)計(jì)
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