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src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7ed828d5180153816d54b7ecfa6f4f7c.png\">","不一定服从正态分布","服从\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F35ca813ac837440daff6d04ff8cd58a9.png\">","若\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2132541515be970ddba26b9088d28c87.png\">与\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff8e91220243d19401df4bef0bc5b82d4.png\">相互独立且均服从标准正态分布,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbbe9a2144d673d5cf626317e7ad4001c.png\">( )",{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":21,"type":22},[],272386809,[78,79,80,81],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F742ec2787daf5f26bdb56df269a7d6b1.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fce04680e245c92c65c0dcd34c6264fae.png\">","\u003Cimg 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