设二维连续随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的联合密度函数为[tex=14.643x3.357]k577xRm0ZOCUJhn0k/ylevdeQMRjBzLLf+gr+H41+NCI002C5c2T5KFtMlkY+d47eSlDdwSCbOABmnX/aYzIOIY0jwff/an/mLbPI/YQOgFk3Ad29zEwYrpF7QAhY923mRZW/1s2O3Ck/TuTnd0l4g==[/tex]求条件密度函数[tex=3.214x1.357]yufEaeeLA9cy2OFUsfS1Pw==[/tex].
举一反三
- 设二维离散随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的可能值为(0, 0),(−1, 1),(−1, 2),(1, 0),且取这些值的概率依次为1/6, 1/3, 1/12, 5/12,试求[tex=0.857x1.0]N7iCrOsS+NNEUUlnsYCi1g==[/tex]与[tex=0.643x1.0]O+viFNA0oHTwnBtQyi80Zw==[/tex] 各自的边际分布列.
- 设二维连续随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex] 的联合密度函数为[tex=13.714x2.929]k577xRm0ZOCUJhn0k/ylevdeQMRjBzLLf+gr+H41+NAf7ns8LusJZWhyUnYsA+V5o1LhHP0LJ7/PAg52LHn/W3mQL6E5VfHgPXm6IfUj5FqnxgVh7q0Du3nAC/wEuj8kUhEOLeluNkXH80a2y/zUow==[/tex]试求[tex=5.857x1.357]ejJWNrXbSmGu5agSmFj+0d9/qI47GLm4JsEgF9xYstc=[/tex]
- 设二维随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的联合密度函数为[tex=15.786x3.357]k577xRm0ZOCUJhn0k/ylevdeQMRjBzLLf+gr+H41+NCJFieJ/hDl6Fw4YJaId4uRR+XQ9h6ic6B/zr/OJGgt1pgA/KVkSna1HxQzZY2n3IGa2SIgMhiTnzRTy3vDqo1WI/6Zk6wTmMBfrNqbsKd8UA==[/tex]试求边际密度函数[tex=2.286x1.357]zSDTlsm7JRcFsxGam0EgRg==[/tex]和[tex=2.143x1.357]V59RoF1dxPh1udh4MqkqXA==[/tex].
- 设二维随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的联合密度函数如下,试问[tex=2.643x1.286]1Hu3J6L7ix9b4TuPkzZg9w==[/tex]是否相互独立?[tex=15.357x3.357]k577xRm0ZOCUJhn0k/ylevdeQMRjBzLLf+gr+H41+NDa2tprvc4oHabvE69l1JsFlZWQFwT9w8y7NvzbI6bbwqMEsLIhlfLvGxd0uz6yfsHiJ5hEoZ8n071KV04x6KLVzmZSW//vhsZZno/WQetIEIL67PkPDDCzaEmu5xDr9/g=[/tex]
- 设二维随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的联合密度函数如下,试问[tex=2.643x1.286]1Hu3J6L7ix9b4TuPkzZg9w==[/tex]是否相互独立?[tex=13.5x2.929]k577xRm0ZOCUJhn0k/ylevdeQMRjBzLLf+gr+H41+NBM4P2PL1RUz/igQU9VyZ3MEv6oxwe67pVfh9T4JZXFsntMtIzZFhDyThno+s0oGhjVCF9aTUJtxUJAD7IIns1V[/tex]