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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(fèi)用的函數(shù),并想通過廣告費(fèi)用對(duì)月銷售額作出估計(jì)。用電視廣告費(fèi)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(fèi)用每增加$1,000, 銷售額增加$1.420 211
B.廣告費(fèi)用每增加$1,000, 銷售額增加$1420. 211
C.廣告費(fèi)用每增加$1420.211, 銷售額增加$1000
D.廣告費(fèi)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(fèi)用 (X) 對(duì)銷售量 (Y) 的影響,收集了過去12年的有關(guān)數(shù)據(jù)。通過計(jì)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
最新試題
One advantage of a stem and leaf plot over a frequency distribution is that ().
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個(gè)車間,這四個(gè)車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?
某企業(yè)2018年技術(shù)工占50%,2019年新招收了一批學(xué)徒工,使學(xué)徒工的比重增加了10%。假定全廠各級(jí)工資水平均無變化,則2019年職工總平均工資將()
以2000年a0為最初水平,2016年an為最末水平,計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí),須開()
某廠某年職工勞動(dòng)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()
什么是季節(jié)變動(dòng)?研究它的意義何在?如何測(cè)定季節(jié)變動(dòng)?
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?()
Descriptive statistics deals with methods of()
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?()
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()