A.算術(shù)平均數(shù)
B.中位數(shù)
C.眾數(shù)
D.調(diào)和平均數(shù)
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A.2個
B.3個
C.4個
D.5個
A.任意調(diào)查
B.立意調(diào)查
C.配額抽樣
D.整群抽樣
A.名義尺度
B.順序尺度
C.差距尺度
D.比例尺度
A.每個省的人口
B.每個縣的人口
C.每個家庭的人口
D.每個人
A.專家評定法
B.層次分析法
C.功效系數(shù)法
D.總和合成法
E.乘積合成法
最新試題
Descriptive statistics deals with methods of（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
品合格率指標(biāo)是（）
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？
什么是季節(jié)變動？研究它的意義何在？如何測定季節(jié)變動？
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？（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
Which of the following is not the goal of descriptive statistics?（）
在組距數(shù)列中，下限就是（）