研究如何利用样本数据来推断总体特征的统计学方法是（ ). [中央财经大学2012研]

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30461' and id < 2461086 and id<>'2461086' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30461' and id > 2461086 and id<>'2461086' order by id asc limit 5