某汽车生产商欲了解广告费用X对销售量Y的影响,收集了过去12年的有关数据。通过计算得到下面的有关结果:
销售量的变差中有多少是由于广告费用的变动引起的?您可能感兴趣的试卷
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假设检验中拒绝域为()
A.Z<-1.96
B.Z>1.96
C.Z>1.65
D.Z<-1.65
一家电器销售公司的管理人员认为,每月的销售额是广告费用的函数,并想通过广告费用对月销售额作出估计。用电视广告费用作自变量,销售额作因变量进行回归分析。下表给出了相关的分析结果,
下列说法正确的是()
A.广告费用每增加$1,000, 销售额增加$1.420 211
B.广告费用每增加$1,000, 销售额增加$1420. 211
C.广告费用每增加$1420.211, 销售额增加$1000
D.广告费用每增加$1, 销售额增加$363.689 1
A.组间平方和除以组内平方和
B.组内均方和除以组间均方
C.组间平方和除以总平方和
D.组间均方和除以组内均方
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
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