最能反映離散程度的指標是（）

The number of class intervals in a frequency distribution is usually between （）.

一個地區(qū)一定時期的商品零售額屬于（）

Descriptive statistics deals with methods of（）

為什么在計算平均指標的基礎(chǔ)上還有必要進一步計算變異指標？

Which of the following statements is not true？（）

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

以2000年a0為最初水平，2016年an為最末水平，計算鋼產(chǎn)量的年平均發(fā)展速度時，須開（）

If data are grouped into intervals and the number of items in each group is listed, this could be called a （）

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 （）.