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
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A.midpoint frequency
B.cumulative frequency
C.stem and leaf plot
D.relative frequency
A.histogram
B.ogive
C.stem and leaf chart
D.pie chart
A.15次方
B.16次方
C.17次方
D.18次方
A.an ogive
B.a histogram
C.a frequency polygon
D.a stem and leaf plot
A.比例相對(duì)數(shù)
B.計(jì)劃完成相對(duì)數(shù)
C.強(qiáng)度相對(duì)數(shù)
D.動(dòng)態(tài)相對(duì)數(shù)
A.每個(gè)組的最小值
B.每個(gè)組的最大值
C.全距中的最大值
D.全距中的最小值
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.80
B.200
C.20
D.100
A.One form of descriptive statistics uses graphical techniques
B.One form of descriptive statistics uses numerical techniques
C.In the language of statistics，the term population refers to a group of people
D.Statistical inference is used to draw conclusions or inferences about characteristics of populations based on sample data
A.普查
B.抽樣調(diào)查
C.重點(diǎn)調(diào)查
D.典型調(diào)查
最新試題
A cumulative frequency polygon is also called （）.
One advantage of a stem and leaf plot over a frequency distribution is that （）.
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？（）
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
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？（）
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（）
品合格率指標(biāo)是（）
Which of the following is not the goal of descriptive statistics?（）
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（）