采用随机抽样法抽到一个容量为20的样本数据,分组后,各组的频数如下表分组(10, 发布时间:2017-05-03 04:21 │ 来源:www.tikuol.com 题型:选择题 问题: 采用随机抽样法抽到一个容量为20的样本数据,分组后,各组的频数如下表分组(10,20](20,30](30,40](40,50](50,60](60,70]频数23x5y2已知样本数据在(20,40]的频率为0.35,则样本数据在区间(50,60]上的频率为( )A.0.70B.0.50C.0.25D.0.20
题型:选择题 When I arrived,I saw the place was already______ by two strangers in uniforms. [ ]A. occupied B. conquered C. possessed D. owned 查看答案