A.80%~89%，90%~99%，100%~109%，110%以上
B.80%以下，80.1%~90%，90.1%~100%，100.1%~110%
C.90%以下，90%~100%，100%~110%，110%以上
D.85%以下，85%~95%，95%~100%，105%~115%
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A.小于1
B.等于1
C.大于1
D.不等于1
A.普查
B.抽樣調(diào)查
C.重點調(diào)查
D.典型調(diào)查
A.年齡
B.學習成績
C.專業(yè)
D.個人愛好
A.是等距分組
B.第一組假定下限是0
C.相鄰組限是重疊的
D.分組標志為連續(xù)型變量
E.某學生的成績80分應歸在70-80這一組
A.15次方
B.16次方
C.17次方
D.18次方
最新試題
要了解某地區(qū)全部大學生的就業(yè)情況，那么（）
The number of class intervals in a frequency distribution is usually between （）.
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間，這四個車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少？
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 cumulative frequency of the third class？（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
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？
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 （）.
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 （）.
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（）