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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。下表給出了相關的分析結果:
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
某汽車生產(chǎn)商想要了解廣告費用 (X) 對銷售量 (Y) 的影響,收集了過去12年的有關數(shù)據(jù)。通過計算得到下面的ANOVA表,其中顯著水平α=0.05。
方差分析表中虛線所代表的數(shù)據(jù)分別為()
A.4015.807和399.1
B.4015.807和0.0025
C.0.9755和399.1
D.0.0244和0.0025
A.1065
B.1066
C.1067
D.1068
A.Z<-1.96
B.Z>1.96
C.Z>1.65
D.Z<-1.65
A.7~13
B.8~12
C.9~11
D.9.5~10.5
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最新試題
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()
最能反映離散程度的指標是()
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?
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 ().
Which of the following statements is not true?()
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 ().
A cumulative frequency distribution would provide().
對某班級學生的生活狀況進行統(tǒng)計調查,下列標志中屬于不變標志的是()