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 （）.

One advantage of a stem and leaf plot over a frequency distribution is that （）.

某班的學(xué)習(xí)按考試成績(jī)分為60分以下，60-70，70-80，80-90，90-100，這種分組（）

One rule that must always be followed in constructing frequency distributions is that （）.

Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）

If data are grouped into intervals and the number of items in each group is listed, this could be called a （）

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 （）.

要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）

Which of the following statements is not true？（）

時(shí)間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？