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假設(shè)檢驗中拒絕域為()
A.Z<-1.96
B.Z>1.96
C.Z>1.65
D.Z<-1.65
一家電器銷售公司的管理人員認(rèn)為,每月的銷售額是廣告費用的函數(shù),并想通過廣告費用對月銷售額作出估計。用電視廣告費用作自變量,銷售額作因變量進(jìn)行回歸分析。下表給出了相關(guān)的分析結(jié)果,
下列說法正確的是()
A.廣告費用每增加$1,000, 銷售額增加$1.420 211
B.廣告費用每增加$1,000, 銷售額增加$1420. 211
C.廣告費用每增加$1420.211, 銷售額增加$1000
D.廣告費用每增加$1, 銷售額增加$363.689 1
A.組間平方和除以組內(nèi)平方和
B.組內(nèi)均方和除以組間均方
C.組間平方和除以總平方和
D.組間均方和除以組內(nèi)均方
A.(1.645,1.96)
B.(0.40,0.50)
C.(0.45,0.55)
D.(0.419,0.481)
A.F0.05,10,20 = 1/F0.95,10,20
B.F0.05,10,20 = 1/F0.05,20,10
C.F0.95,10,20 = 1/F0.95,20,10
D.F0.95,10,20 = 1/F0.05,20,10
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()
品合格率指標(biāo)是()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
A summary measure that is computed from a sample to describe a characteristic of the population is called()
One advantage of a stem and leaf plot over a frequency distribution is that ().
對全國各鐵路交通樞紐的貨運量、貨物種類等進(jìn)行調(diào)查,以了解全國鐵路貨運概況。這種調(diào)查屬于()
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?
Which of the following is not the goal of descriptive statistics?()
在組距數(shù)列中,下限就是()