A.變窄
B.變寬
C.不變
D.不能確定
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A.要寬
B.要窄
C.相同
D.可能寬也可能窄
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(wú)論大與小
D.無(wú)法判斷
A.隨機(jī)誤差
B.抽樣框誤差
C.回答誤差
D.無(wú)回答誤差
五位部門(mén)經(jīng)理的年收入如表:要描述五位部門(mén)經(jīng)理的年收入的一般水平,()來(lái)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
最新試題
One advantage of a stem and leaf plot over a frequency distribution is that ().
Which of the following statements is not true?()
One rule that must always be followed in constructing frequency distributions is that ().
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 ().
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()
A summary measure that is computed from a sample to describe a characteristic of the population is called()
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)四個(gè)車(chē)間,這四個(gè)車(chē)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?
Descriptive statistics deals with methods of()
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?
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()