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(diǎn)調(diào)查
D.典型調(diào)查
A.年齡
B.學(xué)習(xí)成績
C.專業(yè)
D.個(gè)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(biāo)志為連續(xù)型變量
E.某學(xué)生的成績80分應(yīng)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
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？（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
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 （）.
品合格率指標(biāo)是（）
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？（）
If the individual class frequency is divided by the total frequency, the result is the （）.
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
某班的學(xué)習(xí)按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個(gè)車間，這四個(gè)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？
One advantage of a stem and leaf plot over a frequency distribution is that （）.