A.發(fā)病率
B.性別
C.年齡段
D.居住地區(qū)
E.工作環(huán)境
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A.單樣本t檢驗是對樣本來自的總體的均值檢驗
B.單樣本t檢驗中要求數(shù)據(jù)只包含一個個案
C.單樣本t檢驗要求樣本來自的總體服從或近似服從正態(tài)分布
D.單樣本t檢驗中原假設(shè)是總體均值與檢驗值存在顯著差異
E.單樣本t檢驗可以對總體比例進行檢驗
A.反映集中趨勢的描述統(tǒng)計量
B.反映總規(guī)?？偹降拿枋鼋y(tǒng)計量
C.反映離散程度的描述統(tǒng)計量
D.反映分布形態(tài)的描述統(tǒng)計量
A.數(shù)據(jù)拆分選擇的菜單是Data－Split File
B.數(shù)據(jù)拆分的本質(zhì)就是對數(shù)據(jù)按拆分變量進行排序
C.數(shù)據(jù)拆分的本質(zhì)是將一個數(shù)據(jù)文件分成了若干個獨立的數(shù)據(jù)文件
D.數(shù)據(jù)拆分對后面的分析一直起作用，直到取消拆分為止
A.排序只針對某列變量進行
B.多重排序中排序變量的次序與排序結(jié)果無關(guān)
C.排序是對整行數(shù)據(jù)排序
D.第一個排序變量也稱為主排序變量
E.通過數(shù)據(jù)排序能快捷地發(fā)現(xiàn)數(shù)據(jù)中的異常值
A. 通用文件，可以被通用軟件如寫字板等打開
B. 有結(jié)構(gòu)的數(shù)據(jù)文件
C. 只能在SPSS中才能打開
D. 數(shù)據(jù)文件的擴展名是.sav
最新試題
時間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
A cumulative frequency distribution would provide（）.
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 （）.
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間，這四個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？
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（）
在組距數(shù)列中，下限就是（）
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). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.
If the individual class frequency is divided by the total frequency, the result is the （）.
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？（）