—组数据的离散系数为0.6,平均数为10,则方差为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30462' and id < 2461198 and id<>'2461198' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30462' and id > 2461198 and id<>'2461198' order by id asc limit 5