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,為正態(tài)分布
C.只有當(dāng)n≥30時,為正態(tài)分布
D.非正態(tài)分布
A.足夠大時
B.足夠小時
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.大于
B.小于
C.等于
D.不能確定大于或小于
最新試題
Which of the following statements is not true?()
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組,請指出哪項(xiàng)是正確的()
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()
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()
在組距數(shù)列中,下限就是()
One advantage of a stem and leaf plot over a frequency distribution is that ().
變量數(shù)列中,各組頻率之和應(yīng)()
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?()
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?()
Descriptive statistics deals with methods of()