The number of class intervals in a frequency distribution is usually between （）.

If the individual class frequency is divided by the total frequency, the result is the （）.

某企業(yè)2018年技術工占50%，2019年新招收了一批學徒工，使學徒工的比重增加了10%。假定全廠各級工資水平均無變化，則2019年職工總平均工資將（）

時間序列構成因素有哪些？分解的基本原理和思路是什么？

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

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 （）.

Which of the following statements is not true？（）

某廠某年職工勞動生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）

一個地區(qū)一定時期的商品零售額屬于（）

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