04年数学一的22题,E(XY)怎么求的?XY不独立,用不上EX*EY一本参考书上说E(XY)=P(AB) 为什么?yccfly0405 顺便再问一句,概率中参数估计这一部分重点在哪里?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 21:16:48
![04年数学一的22题,E(XY)怎么求的?XY不独立,用不上EX*EY一本参考书上说E(XY)=P(AB) 为什么?yccfly0405 顺便再问一句,概率中参数估计这一部分重点在哪里?](/uploads/image/z/3990002-50-2.jpg?t=04%E5%B9%B4%E6%95%B0%E5%AD%A6%E4%B8%80%E7%9A%8422%E9%A2%98%2CE%EF%BC%88XY%EF%BC%89%E6%80%8E%E4%B9%88%E6%B1%82%E7%9A%84%3FXY%E4%B8%8D%E7%8B%AC%E7%AB%8B%2C%E7%94%A8%E4%B8%8D%E4%B8%8AEX%2AEY%E4%B8%80%E6%9C%AC%E5%8F%82%E8%80%83%E4%B9%A6%E4%B8%8A%E8%AF%B4E%EF%BC%88XY%EF%BC%89%3DP%EF%BC%88AB%EF%BC%89+%E4%B8%BA%E4%BB%80%E4%B9%88%3Fyccfly0405+%E9%A1%BA%E4%BE%BF%E5%86%8D%E9%97%AE%E4%B8%80%E5%8F%A5%EF%BC%8C%E6%A6%82%E7%8E%87%E4%B8%AD%E5%8F%82%E6%95%B0%E4%BC%B0%E8%AE%A1%E8%BF%99%E4%B8%80%E9%83%A8%E5%88%86%E9%87%8D%E7%82%B9%E5%9C%A8%E5%93%AA%E9%87%8C%EF%BC%9F)
xT]of+YNpv}.j.lmJ&9 !*[2`fYI%68}m_zl/4SӋL$c|Dҋ4S1>!M5,k46"jErhiesY?JKѹ%ЫWC:*YIa;wABTHy$)CΗ>dCzYR@d8]Տ`p1ofVǭ.쌍vD|Dݬ"7eQ_H#KTdo@Z[vWZ\Ѥs.:]m\FcM?0;"㉌X?PA18o7>3^< RhmS97n\gVP#WsGr0yY4̿-S͙:.uWLW٬QpNkr 7q__^z=yZ2ۿ{6P1Z]'-HO#ېU9 >X$ ө/?T$L'SKյՌO_Շ7T"J}[