A.各個(gè)個(gè)體的名稱與指標(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
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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
品合格率指標(biāo)是()
某廠某年職工勞動(dòng)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()
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()
Descriptive statistics deals with methods of()
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour?()
The number of class intervals in a frequency distribution is usually between ().
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于()
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 ().
在組距數(shù)列中,下限就是()
要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()