第25题: [单项选择]Our association, which has consistently pressed for greater employment opportunities for the disabled, will publish ______ proposals in the near future. A. their B. our C. his D. its 参考答案:D 答案解析:[考点] 考查代词的用法。 本句的主语是association,后跟which引导的定语从句,从句中的谓语动词为has pressed for。association是物不是人,因此代词应该
第26题: [名词解释]标准误及Xs 参考答案:
通常将样本统计量的标准差称为标准误。许多样本均数的标准差Xs称为均数的标准误(standard error of mean,SEM),它反映了样本均数间的离散程度,也反映了样本均数与总体均数的差异,说明均数抽样误差的大小。