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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最新試題
One advantage of a stem and leaf plot over a frequency distribution is that ().
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()
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)?
A cumulative frequency polygon is also called ().
時(shí)間序列構(gòu)成因素有哪些?分解的基本原理和思路是什么?
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?()
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()
Descriptive statistics deals with methods of()
某企業(yè)2018年技術(shù)工占50%,2019年新招收了一批學(xué)徒工,使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無變化,則2019年職工總平均工資將()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()