A.sample based upon information contained in the population
B.population based upon information contained in the sample
C.population based upon information contained in the population
D.mean of the sample based upon the mean of the population
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A.P（A） must be equal to P（B）
B.P（A） must be greater thanP（B）
C.P（A） must be less than P（B）
D.P（A） must be equal to P（A│B）
Exhibit 2 The following represents the probability distribution for the daily demand of computers at a local store.
Refer to Exhibit 2.The probability of having a demand for at least two computers is（）
A.0.7
B.0.3
C.0.4
D.1.0
A.0.0896
B.0.2936
C.0.0413
D.0.0007
A.a probability function
B.a random variable
C.thee xpected value
D.random function
A.0.4332
B.0.9332
C.0.0668
D.0.5668
最新試題
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個(gè)車間，這四個(gè)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？
Descriptive statistics deals with methods of（）
If the individual class frequency is divided by the total frequency, the result is the （）.
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？（）
最能反映離散程度的指標(biāo)是（）
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 （）.
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
某廠某年職工勞動(dòng)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（）
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 （）.
One rule that must always be followed in constructing frequency distributions is that （）.