單項(xiàng)選擇題

Descriptive statistics deals with methods of（）

A.organising data.
B.summarising data
C.presenting data in a convenient and informative way
D.doing all of the above

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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