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
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一家電器銷售公司的管理人員認為,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
A.第一類錯誤被稱為棄真錯誤
B.第一類錯誤被稱為納偽錯誤
C.第二類錯誤是原假設(shè)不正確,但卻被接受的錯誤
D.第一類錯誤是原假設(shè)正確,但卻被拒絕的錯誤
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最新試題
A cumulative frequency distribution would provide().
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). The average number of absences per employee, calculated from the personnel data of all employees, is a ().
某班的學習按考試成績分為60分以下,60-70,70-80,80-90,90-100,這種分組()
The number of class intervals in a frequency distribution is usually between ().
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?()
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?
One rule that must always be followed in constructing frequency distributions is that ().
Descriptive statistics deals with methods of()