A.總體大小
B.個(gè)體多少
C.理論范圍
D.具體范圍
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A.概念
B.數(shù)值
C.概念和數(shù)值
D.數(shù)值尺度
A.單值
B.等距分組
C.異距分組
D.復(fù)合分組
A.各個(gè)個(gè)體的名稱(chēng)與指標(biāo)數(shù)值
B.各組變量值與次數(shù)
C.各組變量值與其方差
D.各組均值與方差
A.簡(jiǎn)單隨機(jī)抽樣
B.系統(tǒng)抽樣
C.分層抽樣
D.整群抽樣
A.必須相同
B.必須不同
C.可以相同，也可以不同
D.完全沒(méi)有關(guān)系
最新試題
某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學(xué)徒工，使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無(wú)變化，則2019年職工總平均工資將（）
變量數(shù)列中，各組頻率之和應(yīng)（）
品合格率指標(biāo)是（）
A cumulative frequency distribution would provide（）.
Which of the following statements is not true？（）
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 the individual class frequency is divided by the total frequency, the result is the （）.
Which of the following is not the goal of descriptive statistics?（）
One rule that must always be followed in constructing frequency distributions is that （）.
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 （）.