證券分析人員為了研究資金運用效率對制造商收益的影響，隨機抽取了5個公司，得到如下資料：
要求計算：
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時間序列構成因素有哪些？分解的基本原理和思路是什么？
在組距數(shù)列中，下限就是（）
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？（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
品合格率指標是（）
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間，這四個車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少？
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
要了解某地區(qū)全部大學生的就業(yè)情況，那么（）
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 （）.