有下列甲、乙两组工人工资数据：甲组工人工资400, 450, 250, 300；乙组工人工资300, 475, 350, 275。若要比较这两组工人平均工资差异程度大小，应选用的方法是 ( )。[首经贸2006研]

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30462' and id < 2461188 and id<>'2461188' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30462' and id > 2461188 and id<>'2461188' order by id asc limit 5