Which of the following statements is not true？（）

A cumulative frequency distribution would provide（）.

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？

變量數(shù)列中，各組頻率之和應（）

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

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（）

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 （）.

什么是季節(jié)變動？研究它的意義何在？如何測定季節(jié)變動？

如果居民按報告期價格購買商品需多支出40萬元，報告期商品銷售額為200萬元，則價格指數(shù)為（）

A cumulative frequency polygon is also called （）.