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D.整群抽樣
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A cumulative frequency polygon is also called ().
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()
One rule that must always be followed in constructing frequency distributions is that ().
常用的長期趨勢測定的方法有哪些?各有什么特點?
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
以2000年a0為最初水平,2016年an為最末水平,計算鋼產(chǎn)量的年平均發(fā)展速度時,須開()
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?
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?
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 ().
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調(diào)查,以了解全國鐵路貨運概況。這種調(diào)查屬于()