A.If condition is satisfied
B.Random sample of cases-Approxomately
C.Use filter Variable
D.Random sample of cases-Exactly
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A.計(jì)算三門課程成績的平均分
B.計(jì)算三門課程成績的標(biāo)準(zhǔn)差
C.計(jì)算三門課程成績的方差
D.計(jì)算三門課程成績的總分
A.Both file iprovide cases
B.External file is keyed table
C.Working data file is keyed table
D.Indicate case source as variable
A.待合并的兩個(gè)數(shù)據(jù)文件的數(shù)據(jù)結(jié)構(gòu)完全相同
B.可以是兩個(gè)完全不相干的數(shù)據(jù)文件
C.在兩個(gè)數(shù)據(jù)文件中,數(shù)據(jù)含義相同的數(shù)據(jù)項(xiàng)最好起相同的變量名
D.待合并的兩個(gè)數(shù)據(jù)文件的個(gè)案數(shù)相同
A.Name
B.Label
C.Values
D.Missing
A.定類型變量
B.定序型變量
C.定距型變量
最新試題
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 ().
One advantage of a stem and leaf plot over a frequency distribution is that ().
在組距數(shù)列中,下限就是()
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()
以2000年a0為最初水平,2016年an為最末水平,計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí),須開()
什么是季節(jié)變動(dòng)?研究它的意義何在?如何測定季節(jié)變動(dòng)?
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?
A cumulative frequency polygon is also called ().
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()