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
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A.隨機(jī)誤差
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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)
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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
A.純隨機(jī)抽樣
B.等距抽樣
C.分層抽樣
D.整群抽樣
最新試題
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？（）
A cumulative frequency distribution would provide（）.
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
在組距數(shù)列中，下限就是（）
什么是季節(jié)變動(dòng)？研究它的意義何在？如何測(cè)定季節(jié)變動(dòng)？
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（）
品合格率指標(biāo)是（）
If the individual class frequency is divided by the total frequency, the result is the （）.
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 （）.