设列联表的行数为3，列数为4，则X2检验的自由度为（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30463' and id < 2461322 and id<>'2461322' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30463' and id > 2461322 and id<>'2461322' order by id asc limit 5