Which of the following is not the goal of descriptive statistics?（）

Descriptive statistics deals with methods of（）

在組距數(shù)列中，下限就是（）

什么是季節(jié)變動(dòng)？研究它的意義何在？如何測定季節(jié)變動(dòng)？

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

某班的學(xué)習(xí)按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）

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 （）.

常用的長期趨勢測定的方法有哪些？各有什么特點(diǎn)？

對(duì)全國各鐵路交通樞紐的貨運(yùn)量、貨物種類等進(jìn)行調(diào)查，以了解全國鐵路貨運(yùn)概況。這種調(diào)查屬于（）

A cumulative frequency polygon is also called （）.