A.隨機(jī)誤差
B.抽樣框誤差
C.回答誤差
D.無(wú)回答誤差
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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)
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
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 class intervals in a frequency distribution is usually between （）.
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 （）.
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)四個(gè)車間，這四個(gè)車間的廢品率分別為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？
變量數(shù)列中，各組頻率之和應(yīng)（）
常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些？各有什么特點(diǎn)？
Which of the following statements is not true？（）
在組距數(shù)列中，下限就是（）
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). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.