单项选择题

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

A.a parameter
B.a statistic
C.a population
D.Both A and C are correct，since they are the same

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单项选择题

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 （）.

A.population
B.sample
C.parameter
D.statistic

单项选择题

A politician who is running for the office of premier in a state with 3 million registered voters commissions a survey. In the survey, 53.6% of the 5000 registered voters interviewed say they plan to vote for him. The population of interest is the（）

A.3 million registered voters in the state.
B.5000 registered voters interviewed.
C.53.6%of，or 2680，voters interviewed who plan to vote for him
D.46.4%of，or 2320，voters interviewed who plan not to vote for him