A.計(jì)算三門課程成績(jī)的平均分
B.計(jì)算三門課程成績(jī)的標(biāo)準(zhǔn)差
C.計(jì)算三門課程成績(jī)的方差
D.計(jì)算三門課程成績(jī)的總分
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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
A.SPSS數(shù)據(jù)文件和Excel表格是一樣的
B.數(shù)據(jù)文件中一行或一列是一個(gè)變量
C.數(shù)據(jù)文件中有變量視窗和數(shù)據(jù)視窗兩個(gè)視窗
D.SPSS數(shù)據(jù)文件可以用Excel打開(kāi)
最新試題
最能反映離散程度的指標(biāo)是（）
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)？
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（）
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？（）
If the individual class frequency is divided by the total frequency, the result is the （）.
變量數(shù)列中，各組頻率之和應(yīng)（）
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 （）.
A summary measure that is computed from a sample to describe a characteristic of the population is called（）