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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,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年的有關數據。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據分別為()
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
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最新試題
One advantage of a stem and leaf plot over a frequency distribution is that ().
什么是季節(jié)變動?研究它的意義何在?如何測定季節(jié)變動?
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,則價格指數為()
要了解某地區(qū)全部大學生的就業(yè)情況,那么()
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ().
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()
時間序列構成因素有哪些?分解的基本原理和思路是什么?
Which of the following statements is not true?()
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 is best to show the percentage of a total budget that is spent on each category of items?()