某汽車生產(chǎn)商欲了解廣告費用X對銷售量Y的影響,收集了過去12年的有關數(shù)據(jù)。通過計算得到下面的有關結果:
銷售量的變差中有多少是由于廣告費用的變動引起的?您可能感興趣的試卷
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A summary measure that is computed from a sample to describe a characteristic of the population is called()
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()
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 ().
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()
A cumulative frequency polygon is also called ().
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?
Which of the following statements is not true?()
在組距數(shù)列中,下限就是()
時間序列構成因素有哪些?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()