A.全距
B.標準差
C.平均差
D.標準差系數(shù)
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A.提高
B.下降
C.不變
D.條件不夠,無法判斷
A.每個組的最小值
B.每個組的最大值
C.全距中的最大值
D.全距中的最小值
A.80%~89%,90%~99%,100%~109%,110%以上
B.80%以下,80.1%~90%,90.1%~100%,100.1%~110%
C.90%以下,90%~100%,100%~110%,110%以上
D.85%以下,85%~95%,95%~100%,105%~115%
A.小于1
B.等于1
C.大于1
D.不等于1
A.普查
B.抽樣調(diào)查
C.重點調(diào)查
D.典型調(diào)查
最新試題
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()
Which of the following statements is not true?()
One rule that must always be followed in constructing frequency distributions is that ().
某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組,請指出哪項是正確的()
最能反映離散程度的指標是()
在組距數(shù)列中,下限就是()
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 ().
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()