A.隨機(jī)誤差
B.抽樣框誤差
C.回答誤差
D.無回答誤差
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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
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
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
A cumulative frequency polygon is also called （）.
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 （）.
對全國各鐵路交通樞紐的貨運(yùn)量、貨物種類等進(jìn)行調(diào)查，以了解全國鐵路貨運(yùn)概況。這種調(diào)查屬于（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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？（）
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)？
One rule that must always be followed in constructing frequency distributions is that （）.
常用的長期趨勢測定的方法有哪些？各有什么特點(diǎn)？