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某汽車交易市場共發(fā)生了150項交易,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,該項是分期付款的概率是()
A.0.95
B.0.5
C.0.8
D.0.25
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相互獨立
B.A與B不獨立
C.A與B相互排斥
D.A與B相關(guān)
最新試題
對某班級學(xué)生的生活狀況進(jìn)行統(tǒng)計調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()
The number of class intervals in a frequency distribution is usually between ().
什么是季節(jié)變動?研究它的意義何在?如何測定季節(jié)變動?
某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組,請指出哪項是正確的()
一個地區(qū)一定時期的商品零售額屬于()
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間,這四個車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?
A cumulative frequency polygon is also called ().
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a ().
在組距數(shù)列中,下限就是()
If the individual class frequency is divided by the total frequency, the result is the ().