某企業(yè)準備用3種方法組裝一種新的產(chǎn)品,為確定哪種方法每小時生產(chǎn)的產(chǎn)品數(shù)量最多,隨機抽取了30名工人,并指定每個人使用其中的一種方法。通過對每個工人生產(chǎn)的產(chǎn)品數(shù)進行方差分析得到下面的結(jié)果:
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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?
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 ().
A summary measure that is computed from a sample to describe a characteristic of the population is called()
一個地區(qū)一定時期的商品零售額屬于()
The number of class intervals in a frequency distribution is usually between ().
對某班級學生的生活狀況進行統(tǒng)計調(diào)查,下列標志中屬于不變標志的是()
A cumulative frequency distribution would provide().
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()
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調(diào)查,以了解全國鐵路貨運概況。這種調(diào)查屬于()
Which of the following is not the goal of descriptive statistics?()