【单选题】______, I didn't know how to use the machine.
【单选题】— I want to have the article printed, but I don't know how to use the printer. — You can follow the ______ on the printer. [ ]
【单选题】With modern traffic control facilities, speeders can't expect to escape _____ detected and fined.
【多选题】与标志值有相同计量单位的标志变异指标是( )
【多选题】下列标志变异指标中,与变量值计量单位相同的变异指标有( )
【单选题】The new staff didn't know how to use the system______I explained it to him yesterday.
【单选题】With modern traffic contral facilities, speeders can't expect to escape _____ detected and fined.
【多选题】与标志值同计量单位的标志变异指标有 ( )
【多选题】对于统计学中常用基本概念,下列说法正确的是()。
A.
统计总体中的每一个个体被称为总体单位,也称为样本
C.
样本单位必须取自总体内部,从一个总体中可以抽取许多种不同的样本
E.
变异来自同一总体不同个体之间标志值上的差异,是统计核算的前提条件