某企業(yè)準(zhǔn)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(shí)生產(chǎn)的產(chǎn)品數(shù)量最多，隨機(jī)抽取了30名工人，并指定每個(gè)人使用其中的一種方法。通過對(duì)每個(gè)工人生產(chǎn)的產(chǎn)品數(shù)進(jìn)行方差分析得到下面的結(jié)果：
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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 （）.
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
Descriptive statistics deals with methods of（）
以2000年a0為最初水平，2016年an為最末水平，計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí)，須開（）
Which of the following is not the goal of descriptive statistics?（）
要了解某地區(qū)全部大學(xué)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). 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 （）.
The number of class intervals in a frequency distribution is usually between （）.
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組，請(qǐng)指出哪項(xiàng)是正確的（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）