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.完全沒有關(guān)系
最新試題
對某班級學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
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？（）
One advantage of a stem and leaf plot over a frequency distribution 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). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.
A cumulative frequency distribution would provide（）.
時(shí)間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
變量數(shù)列中，各組頻率之和應(yīng)（）
One rule that must always be followed in constructing frequency distributions is that （）.
品合格率指標(biāo)是（）