您可能感興趣的試卷
你可能感興趣的試題
假設檢驗中拒絕域為()
A.Z<-1.96
B.Z>1.96
C.Z>1.65
D.Z<-1.65
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
A.組間平方和除以組內平方和
B.組內均方和除以組間均方
C.組間平方和除以總平方和
D.組間均方和除以組內均方
A.(1.645,1.96)
B.(0.40,0.50)
C.(0.45,0.55)
D.(0.419,0.481)
![](https://static.ppkao.com/ppmg/img/appqrcode.png)
最新試題
企業(yè)生產一種產品需順次經過四個車間,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)生產這種產品的平均廢品率是多少?
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?()
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()
某企業(yè)2018年技術工占50%,2019年新招收了一批學徒工,使學徒工的比重增加了10%。假定全廠各級工資水平均無變化,則2019年職工總平均工資將()
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?
Which of the following is not the goal of descriptive statistics?()
Which of the following statements is not true?()
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 ().
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
The number of class intervals in a frequency distribution is usually between ().