某廠某年職工勞動生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）

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 （）.

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 advantage of a stem and leaf plot over a frequency distribution is that （）.

The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the cumulative frequency of the third class？（）

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

在組距數(shù)列中，下限就是（）

一個地區(qū)一定時期的商品零售額屬于（）

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

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