A.分類變量
B.分組變量
C.匯總變量
D.目標變量
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A.If condition is satisfied
B.Random sample of cases－Approxomately
C.Use filter Variable
D.Random sample of cases－Exactly
A.計算三門課程成績的平均分
B.計算三門課程成績的標準差
C.計算三門課程成績的方差
D.計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.可以是兩個完全不相干的數(shù)據(jù)文件
C.在兩個數(shù)據(jù)文件中，數(shù)據(jù)含義相同的數(shù)據(jù)項最好起相同的變量名
D.待合并的兩個數(shù)據(jù)文件的個案數(shù)相同
A.Name
B.Label
C.Values
D.Missing
最新試題
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.
某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學徒工，使學徒工的比重增加了10%。假定全廠各級工資水平均無變化，則2019年職工總平均工資將（）
品合格率指標是（）
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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a （）.
Which of the following is not the goal of descriptive statistics?（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
某廠某年職工勞動生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）
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)全部大學生的就業(yè)情況，那么（）
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？（）