將某公司的35名業(yè)務(wù)員隨機(jī)分成5組,分別選用一種培訓(xùn)方法進(jìn)行培訓(xùn),經(jīng)過一段時間的跟蹤調(diào)查,得到了這35名業(yè)務(wù)員的銷售數(shù)據(jù),對銷售數(shù)據(jù)進(jìn)行單因素方差分析,結(jié)果如下:
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對2993戶居民家庭的住房面積進(jìn)行調(diào)查并進(jìn)行檢驗,結(jié)果如下表。
A.中位數(shù)檢驗
B.曼-惠特尼U檢驗
C.K-S檢驗
D.Kruskal-Wallis檢驗
E.Jonckheere-Terpstra檢驗
A.發(fā)病率
B.性別
C.年齡段
D.居住地區(qū)
E.工作環(huán)境
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(jìn)行檢驗
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If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
如果居民按報告期價格購買商品需多支出40萬元,報告期商品銷售額為200萬元,則價格指數(shù)為()
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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?()
One rule that must always be followed in constructing frequency distributions is that ().
Which of the following is not the goal of descriptive statistics?()
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 ().