A.1次
B.2次
C.3次
D.4次
E.5次
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你可能感興趣的試題
A.數(shù)學(xué)期望為0
B.相互獨(dú)立
C.方差為常數(shù)
D.方差隨因子水平的增減而增減
E.服從正態(tài)分布
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
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
最新試題
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
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?()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
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?
Which of the following statements is not true?()
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?
變量數(shù)列中,各組頻率之和應(yīng)()
要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()
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?()
某廠某年職工勞動生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()