（多选）在方差分析的数据结构模型中，需假设随机误差ε( )。 [中央财经大学2015研]

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30463' and id < 2461353 and id<>'2461353' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30463' and id > 2461353 and id<>'2461353' order by id asc limit 5