If the individual class frequency is divided by the total frequency, the result is the （）.

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

時間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？

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

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 （）.

要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）

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（）

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

如果居民按報告期價格購買商品需多支出40萬元，報告期商品銷售額為200萬元，則價格指數(shù)為（）