單項(xiàng)選擇題采取隨機(jī)抽樣抽取1000人,其中有450人支持候選人A,那么支持候選人A的置信度為95%的置信區(qū)間為:()

A.(1.645,1.96)
B.(0.40,0.50)
C.(0.45,0.55)
D.(0.419,0.481)


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題關(guān)于F分布的說法,哪個(gè)是正確的() 

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

2.單項(xiàng)選擇題關(guān)于假設(shè)檢驗(yàn)的兩類錯(cuò)誤,下列說法不正確的有()

A.第一類錯(cuò)誤被稱為棄真錯(cuò)誤
B.第一類錯(cuò)誤被稱為納偽錯(cuò)誤
C.第二類錯(cuò)誤是原假設(shè)不正確,但卻被接受的錯(cuò)誤
D.第一類錯(cuò)誤是原假設(shè)正確,但卻被拒絕的錯(cuò)誤

5.單項(xiàng)選擇題所有可能實(shí)驗(yàn)結(jié)果的集合被稱為一個(gè)()

A.樣本空間
B.事件
C.實(shí)驗(yàn)
D.概率

最新試題

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 ().

題型:單項(xiàng)選擇題

Which of the following is best to show the percentage of a total budget that is spent on each category of items?()

題型:單項(xiàng)選擇題

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?()

題型:單項(xiàng)選擇題

Which of the following is not the goal of descriptive statistics?()

題型:單項(xiàng)選擇題

品合格率指標(biāo)是()

題型:單項(xiàng)選擇題

要了解某地區(qū)全部大學(xué)生的就業(yè)情況,那么()

題型:多項(xiàng)選擇題

常用的長期趨勢(shì)測(cè)定的方法有哪些?各有什么特點(diǎn)?

題型:問答題

A summary measure that is computed from a sample to describe a characteristic of the population is called()

題型:單項(xiàng)選擇題

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 cumulative frequency of the third class?()

題型:單項(xiàng)選擇題

某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組,請(qǐng)指出哪項(xiàng)是正確的()

題型:單項(xiàng)選擇題