[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fzdNkR9oy0nFksGar2vboR3rjKYMLHfMHPdCPmM4Vcwo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":28,"type":29},[],"2024-04-01 20:00:59",136565869,[8,9,10,11],"2","3","4","以上都不对",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},26,"d29f780c4729b40c8d29308b2e37d8af","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd60e3432b27bff72d9a5ef4d3ea47edc.png","概率论与数理统计","work_33864380","第二章 选择题2","已知X服从参数λ=2的Poisson分布,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd20f961aa363ea64398d6a74022f5162.webp\">,则E(Y)=",[21,30,38,45,53,62,69,77,83,92],{"answer":22,"createTime":5,"id":23,"options":24,"question":27,"source":28,"type":29},[],136565860,[25,26,8,11],"0.5","0.16",".已知X的概概率分布列X 0 1 2p0.36 0.48 c,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6302f9dfc9476af316f7f3977fd57de5.png\">( )","v1",0,{"answer":31,"createTime":5,"id":32,"options":33,"question":37,"source":28,"type":29},[],136565861,[25,34,35,36],"0.4","0.3","0.32","设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F77d70e433906fa58d94d8ec8522fc558.png\">,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F66920b9a8e196b76c2852e94be0ae6b1.png\">",{"answer":39,"createTime":5,"id":40,"options":41,"question":44,"source":28,"type":29},[],136565862,[25,42,8,43],"1","-0.5",".已知X的概概率分布列 X 0 1 2 p \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2fdcc6840b0de223f51acd92d3aff322.png\"> \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F540009ba80ad8d23b8403e4b12db1a33.png\">\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F540009ba80ad8d23b8403e4b12db1a33.png\">",{"answer":46,"createTime":5,"id":47,"options":48,"question":52,"source":28,"type":29},[],136565863,[49,50,51,8],"0.8","0.48","-2","已知X的概率分布列X0 1 2p0.36 0.48 0.16则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F66920b9a8e196b76c2852e94be0ae6b1.png\">",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":28,"type":29},[],136565864,[57,58,59,60],"n=2,p=0.8","n=4,p=0.8","n=16,p=0.2","n=6,p=0.6","已知X服从二项分布B(n,p),E(X)=3.2,D(X)=0.64,则",{"answer":63,"createTime":5,"id":64,"options":65,"question":68,"source":28,"type":29},[],136565865,[66,67,25,11],"0.25","0.82","已知随机变量X服从二项分布B(4,p),Y服从二项分布B(2,p),并且P(X≥1)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F487005f1992d8d614d6f7ca302ba44a8.webp\">,则P(Y=2)=",{"answer":70,"createTime":5,"id":71,"options":72,"question":76,"source":28,"type":29},[],136565866,[73,74,75,42],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8f266d35aa5c02fb217a61333e111b73.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff40a440874cefc64e207d9b015b7ab42.webp\">","0.75","已知X服从Poisson分布,并且P(X=1)=P(X=0),则方差D(X)=",{"answer":78,"createTime":5,"id":79,"options":80,"question":82,"source":28,"type":29},[],136565867,[81,42,8,51],"-1","已知D(X)=0.5,则D(1-2X)=",{"answer":84,"createTime":5,"id":85,"options":86,"question":91,"source":28,"type":29},[],136565868,[87,88,89,90],"-3.9","20","5.96","7.2","已知E(X)=2.4,D(X)=1.44,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa379a2a8160d52a833c95132b898a188.webp\">",{"answer":93,"createTime":5,"id":6,"options":94,"question":19,"source":28,"type":29},[],[8,9,10,11]]