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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
最新試題
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?()
為什么在計算平均指標的基礎(chǔ)上還有必要進一步計算變異指標?
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間,這四個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?
The number of class intervals in a frequency distribution is usually between ().
Descriptive statistics deals with methods of()
If the individual class frequency is divided by the total frequency, the result is the ().
在組距數(shù)列中,下限就是()
One rule that must always be followed in constructing frequency distributions is that ().
Which of the following is not the goal of descriptive statistics?()
Which of the following statements is not true?()