[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fuqr09OYuTx209ne7PM3Dc8xs4-arsX0_Q4Uug3V3XFA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":25,"type":26},[],"2025-12-25 08:58:52",285479978,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd81dde6b8b79560cf6110cbdda8eb45d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03e62125dff3fa9a165935ace94ddf1e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb49eec64a8074e720cde8c1866a92ba.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F24a66969b07d5ae7dd57285ac5db702b.png\">",{"courseId":13,"courseImg":14,"courseName":15},"ef095cb37a067242e015cf2132e10b96","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F077416ecbe2508a9820aaabff2470fe1.png","概率论与数理统计","设随机变量X的概率密度函数为f(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3de1d610c184bbbe96558b56e15146c3.png\">,则其分布函数F(20)的值为( )",[18,27,36,39,46,55,63,72,81,90],{"answer":19,"createTime":5,"id":20,"options":21,"question":24,"source":25,"type":26},[],285479976,[22,8,10,23],"1","0","设随机变量X的概率密度为f(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8787d116e44d352ac2e32df603ffb651.png\">,则k等于( )","v1",0,{"answer":28,"createTime":5,"id":29,"options":30,"question":35,"source":25,"type":26},[],285479977,[31,32,33,34],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F29e62267addb729508765e5e78adb73d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe14dcba6644f7d6ae0246ab6cf0a94d6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6489ec0e8343e902b1622cf065452e89.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71c1498523cb361a960b6566d47066e3.png\">","设随机变量X的概率密度为f(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcdc83e411fd3455200df919a580d7262.png\">,则P{-2<X<\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd81dde6b8b79560cf6110cbdda8eb45d.png\">}=_______",{"answer":37,"createTime":5,"id":6,"options":38,"question":16,"source":25,"type":26},[],[8,9,10,11],{"answer":40,"createTime":5,"id":41,"options":42,"question":45,"source":25,"type":26},[],285479979,[43,8,44,9],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F286b0b63a367bb7f26530cc34b549984.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe456af92841b3db4789575527eca6357.png\">","设某随机变量的概率密度函数为f(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff0952a7cbe7c1c46977db2884a02458.png\">,则常数c的值为( )",{"answer":47,"createTime":5,"id":48,"options":49,"question":54,"source":25,"type":26},[],285479980,[50,51,52,53],"仅限(1)和(3)","仅限(3)和(5)","仅限(3)(4)和(5)","仅限(1)(3)和(4)","下列关于连续性随机变量的叙述正确的是______. (1)都具有有限或无限可数(列)的值; (2)分布函数都是右连续,但不是左连续; (3)分布函数都没有跳跃; (4)分布函数都是左右连续的; (5)都具有无限多的值",{"answer":56,"createTime":5,"id":57,"options":58,"question":62,"source":25,"type":26},[],285479981,[59,60,61,23],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffe6e267b1e70bcf9f5f9c6ed2431af61.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd0e195d02601ffa7762316e2294d8139.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F774dd4431d40538ecc2beac4d7baccd1.png\">","设连续型随机变量X的分布函数为F(x)=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb2f1ac58425813831304f05bd0a015ea.png\">,则P{X=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F00383843845cea7e14e13382918ca71d.png\">}=_____",{"answer":64,"createTime":5,"id":65,"options":66,"question":71,"source":25,"type":26},[],285479982,[67,68,69,70],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3b0244a1ed6fa662d4b6bc1046b059e5.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F45265a2e3d6206ca584c504938f20276.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd5a25c655fe0c442969a28c6f79c5319.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fef2b0373c7132f349cacce6b91184e43.png\">","设\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8e0fdd2bb5b7f0e3fd3c6ec96cd4be28.webp\">为两个分布函数,其相应的概率密度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3a08262f822ce1b30afdd50777735d91.png\">是连续函数,则必为概率密度的是( )",{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":25,"type":26},[],285479983,[76,77,78,79],"P(X = x)= F(x)","P(X = x)= f(x)","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F174f62d348d2628af537403201d4607b.webp\">","P(X = x)= 0","设连续型随机变量X的密度函数为f(x),分布函数为F(x),x是任意实数,则下列选项正确的有( )",{"answer":82,"createTime":5,"id":83,"options":84,"question":89,"source":25,"type":26},[],285479984,[85,86,87,88],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1affc7f0f3a73654e14352c31bbf5b64.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffa155c3a10ab4ae4e39bde8a5ddf6a88.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F05e31fa3d920af591770b4e95de79a1e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F252b7c795ee27984fff13608f4cec5d3.png\">","下面四个选项中,( )不是概率密度",{"answer":91,"createTime":5,"id":92,"options":93,"question":96,"source":25,"type":97},[],285479985,[94,95],"正确","错误","连续型随机变量可以解释现象:概率为零的随机事件未必是不可能事件",3]