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A.第一類錯誤被稱為棄真錯誤
B.第一類錯誤被稱為納偽錯誤
C.第二類錯誤被稱為納偽錯誤
D.第二類錯誤是原假設(shè)不正確，但卻被接受的錯誤
E.第一類錯誤是原假設(shè)正確，但卻被拒絕的錯誤
A.完備性原則
B.同質(zhì)性原則
C.整齊可比性原則
D.互斥性原則
E.均衡分散性原則
A.模型設(shè)定誤差
B.對y的觀測誤差
C.對β0的估計錯誤
D.對β1的估計錯誤
E.各種細小的偶然誤差
最新試題
Which of the following statements is not true？（）
某班的學(xué)習(xí)按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a （）.
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
某廠某年職工勞動生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）
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？
One rule that must always be followed in constructing frequency distributions is that （）.
One advantage of a stem and leaf plot over a frequency distribution is that （）.
Which of the following is not the goal of descriptive statistics?（）
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？（）