A.原始数据的组织方式
B.计数数据的组织形式
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A.数据编辑窗口
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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 （）.
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
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？（）
品合格率指标是（）
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（）
A cumulative frequency distribution would provide（）.
变量数列中，各组频率之和应（）
某班的学习按考试成绩分为60分以下，60-70，70-80，80-90，90-100，这种分组（）
什么是季节变动？研究它的意义何在？如何测定季节变动？