A.單樣本t檢驗(yàn)是對(duì)樣本來(lái)自的總體的均值檢驗(yàn)
B.單樣本t檢驗(yàn)中要求數(shù)據(jù)只包含一個(gè)個(gè)案
C.單樣本t檢驗(yàn)要求樣本來(lái)自的總體服從或近似服從正態(tài)分布
D.單樣本t檢驗(yàn)中原假設(shè)是總體均值與檢驗(yàn)值存在顯著差異
E.單樣本t檢驗(yàn)可以對(duì)總體比例進(jìn)行檢驗(yàn)
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A.反映集中趨勢(shì)的描述統(tǒng)計(jì)量
B.反映總規(guī)?？偹降拿枋鼋y(tǒng)計(jì)量
C.反映離散程度的描述統(tǒng)計(jì)量
D.反映分布形態(tài)的描述統(tǒng)計(jì)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(duì)數(shù)據(jù)按拆分變量進(jìn)行排序
C.數(shù)據(jù)拆分的本質(zhì)是將一個(gè)數(shù)據(jù)文件分成了若干個(gè)獨(dú)立的數(shù)據(jù)文件
D.數(shù)據(jù)拆分對(duì)后面的分析一直起作用，直到取消拆分為止
A.排序只針對(duì)某列變量進(jìn)行
B.多重排序中排序變量的次序與排序結(jié)果無(wú)關(guān)
C.排序是對(duì)整行數(shù)據(jù)排序
D.第一個(gè)排序變量也稱為主排序變量
E.通過(guò)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(xiě)字板等打開(kāi)
B. 有結(jié)構(gòu)的數(shù)據(jù)文件
C. 只能在SPSS中才能打開(kāi)
D. 數(shù)據(jù)文件的擴(kuò)展名是.sav
A.窗口主菜單
B.工具欄
C.數(shù)據(jù)編輯區(qū)
D.系統(tǒng)狀態(tài)顯示區(qū)
E.結(jié)果顯示區(qū)
最新試題
A cumulative frequency polygon is also called （）.
品合格率指標(biāo)是（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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 （）.
One advantage of a stem and leaf plot over a frequency distribution is that （）.
The number of class intervals in a frequency distribution is usually between （）.
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 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 （）.
One rule that must always be followed in constructing frequency distributions is that （）.
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)？