A cumulative frequency polygon is also called （）.

要了解某地區(qū)全部大學生的就業(yè)情況，那么（）

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

One rule that must always be followed in constructing frequency distributions is that （）.

Descriptive statistics deals with methods of（）

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 （）.

某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學徒工，使學徒工的比重增加了10%。假定全廠各級工資水平均無變化，則2019年職工總平均工資將（）

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

一個地區(qū)一定時期的商品零售額屬于（）

對某班級學生的生活狀況進行統(tǒng)計調(diào)查，下列標志中屬于不變標志的是（）