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

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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a （）.

最能反映離散程度的指標(biāo)是（）

要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）

變量數(shù)列中，各組頻率之和應(yīng)（）

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

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

一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）

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？（）