A.95%
B.89%
C.68%
D.99%
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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抽取一項,該項是分期付款的概率是()
A.0.95
B.0.5
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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
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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()
Which of the following is not the goal of descriptive statistics?()
One advantage of a stem and leaf plot over a frequency distribution is that ().
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
A cumulative frequency distribution would provide().
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). The average number of absences per employee, calculated from the personnel data of all employees, is a ().
時間序列構(gòu)成因素有哪些?分解的基本原理和思路是什么?
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%。假定全廠各級工資水平均無變化,則2019年職工總平均工資將()
最能反映離散程度的指標是()
變量數(shù)列中,各組頻率之和應(yīng)()