A.it contains more class intervals
B.the values of the original data are retained
C.the class midpoints are used as the stem
D.the class midpoints are used as the leaf
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A.3 and 5
B.7 and 9
C.5 and 15
D.1 and 25
A.an ogive
B.a histogram
C.a frequency polygon
D.a stem and leaf plot
A.midpoint frequency
B.cumulative frequency
C.stem and leaf plot
D.relative frequency
A.ogive
B.histogram
C.frequency distribution
D.stem and leaf plot
A.Summarising data
B.Displaying aspects of the collected data
C.Reporting numerical findings
D.Estimating characteristics of the population
最新試題
最能反映離散程度的指標(biāo)是（）
品合格率指標(biāo)是（）
Which of the following is not the goal of descriptive statistics?（）
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？（）
The number of class intervals in a frequency distribution is usually between （）.
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（）
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)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？
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
什么是季節(jié)變動(dòng)？研究它的意義何在？如何測(cè)定季節(jié)變動(dòng)？