下列选项中，反映均数抽样误差大小的指标是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29721' and id < 2413913 and id<>'2413913' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29721' and id > 2413913 and id<>'2413913' order by id asc limit 5