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(gòu)成因素有哪些？分解的基本原理和思路是什么？
某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組，請指出哪項是正確的（）
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 （）.
為什么在計算平均指標(biāo)的基礎(chǔ)上還有必要進一步計算變異指標(biāo)？
品合格率指標(biāo)是（）
A cumulative frequency polygon is also called （）.
變量數(shù)列中，各組頻率之和應(yīng)（）
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
If the individual class frequency is divided by the total frequency, the result is the （）.
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 （）.