A.加大顯著性水平
B.減小顯著性水平
C.加大樣本容量
D.減小樣本容量
E.使用精確分布
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A.原假設(shè)是精確假設(shè)
B.備擇假設(shè)是精確假設(shè)
C.原假設(shè)是非精確假設(shè)
D.備擇假設(shè)是非精確假設(shè)
E.樣本給定
A.總體中各個個體之間的差異程度
B.樣本容量的大小
C.總體中個體數(shù)的多少
D.樣本的抽取方式
E.抽樣調(diào)查中登記誤差的大小
A.一致性
B.無偏性
C.有效性
D.充分性
E.穩(wěn)健性
A.各組的變量值
B.各組的次數(shù)
C.各組的組中值
D.各組的頻率
E.各組的密度
A.均值大于中位數(shù)
B.均值小于眾數(shù)
C.中位數(shù)小于眾數(shù)
D.均值等于眾數(shù)
E.均值小于中位數(shù)
最新試題
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(biāo)是()
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?()
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 ().
Descriptive statistics deals with methods of()
什么是季節(jié)變動?研究它的意義何在?如何測定季節(jié)變動?
要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()
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()
A cumulative frequency polygon is also called ().
常用的長期趨勢測定的方法有哪些?各有什么特點?