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
A cumulative frequency distribution would provide（）.
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？（）
Which of the following is not the goal of descriptive statistics?（）
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
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 （）.
什么是季節(jié)變動？研究它的意義何在？如何測定季節(jié)變動？
某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組，請指出哪項(xiàng)是正確的（）
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？（）
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 （）.
A summary measure that is computed from a sample to describe a characteristic of the population is called（）