A.要寬
B.要窄
C.相同
D.可能寬也可能窄
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A.正態(tài)分布
B.只有當(dāng)n<30時(shí),為正態(tài)分布
C.只有當(dāng)n≥30時(shí),為正態(tài)分布
D.非正態(tài)分布
A.足夠大時(shí)
B.足夠小時(shí)
C.無論大與小
D.無法判斷
A.隨機(jī)誤差
B.抽樣框誤差
C.回答誤差
D.無回答誤差
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,()來測(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
A.大于
B.小于
C.等于
D.不能確定大于或小于
最新試題
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)?
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 ().
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
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 approximate range of the number of phone calls arriving each hour?()
Descriptive statistics deals with methods of()
某廠某年職工勞動(dòng)生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()
對(duì)某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查,下列標(biāo)志中屬于不變標(biāo)志的是()
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()
Which of the following is not the goal of descriptive statistics?()
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?