设随机变量[tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex]与[tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex]相互独立,且均服从正态分布[tex=2.929x1.357]HQ1ThyvAmW6Uz+O4RYDQEQ==[/tex], 则
未知类型:{'options': ['[tex=7.357x2.357]YL/JIl89M0gu3VLtP9OVm+wJUKpVOs6sLjay+IpCLfNKuVF5MrXi5ZOxTw97xSTR[/tex]', '[tex=7.214x2.357]s5y3Jos3CjXvtlBNpAqdi31jcQQgwFIpDnEiGHxDCfhO5I64uQUdHtKf2DbkG2OY[/tex]', '[tex=9.5x2.357]cfuNzYpgLtbhy5/oM/UYho+1bukKsmUbk7EGbIahkYsC8eoIQoOF1mJJDC1ilTb2[/tex]', '[tex=9.357x2.357]wRhWrlwi6+MC5LM1DdXSDycgnbxuP6I4ybM15hxXQ+zO6d6SBycqUq6QhxZ+Gm4u[/tex]'], 'type': 102}
未知类型:{'options': ['[tex=7.357x2.357]YL/JIl89M0gu3VLtP9OVm+wJUKpVOs6sLjay+IpCLfNKuVF5MrXi5ZOxTw97xSTR[/tex]', '[tex=7.214x2.357]s5y3Jos3CjXvtlBNpAqdi31jcQQgwFIpDnEiGHxDCfhO5I64uQUdHtKf2DbkG2OY[/tex]', '[tex=9.5x2.357]cfuNzYpgLtbhy5/oM/UYho+1bukKsmUbk7EGbIahkYsC8eoIQoOF1mJJDC1ilTb2[/tex]', '[tex=9.357x2.357]wRhWrlwi6+MC5LM1DdXSDycgnbxuP6I4ybM15hxXQ+zO6d6SBycqUq6QhxZ+Gm4u[/tex]'], 'type': 102}
举一反三
- 设两个相互独立的随机变量[tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex]和[tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex]分别服从正态分布[tex=2.929x1.357]HQ1ThyvAmW6Uz+O4RYDQEQ==[/tex]和[tex=3.071x1.357]kCn/dUVT520cfOD4KRVPVQ==[/tex], 则 未知类型:{'options': ['[tex=7.214x2.357]UukMJiMHPruf8anDbUbSKTxK1nWizCE6wR1JDL7qAn1y7A94FKUpxEsjjVcNlMYI[/tex]', '[tex=7.357x2.357]UukMJiMHPruf8anDbUbSKblcia9XehQvvPAmIrJIVqdlVjYeXe9TQojWiFMtikde[/tex]', '[tex=7.357x2.357]Rmfl+SGSIGjpBIYGWSIzrTsO2zDClO1TdPoWbpjMsfOIkZsjD8eqyIHL4lJG4tGq[/tex]', '[tex=7.357x2.357]Rmfl+SGSIGjpBIYGWSIzrYtLRsl1mF9lRUHrlAB07MX83vhek3aoqkYCBo31D3Cg[/tex]'], 'type': 102}
- 设随机变量 [tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex] 与 [tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex] 相互独立,且服从参数为 1 的指数分布. 记 [tex=13.5x1.357]ZrmgIX329+lIMwj+0JP7oX4KmceUiv4NOTdLGvSfjGFY26aIR9qNFK9EJaP3gu/x[/tex] 求[tex=3.857x1.357]t0PsS3YAPSnhTBV9LUFwGQ==[/tex]
- 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.
- 已知随机变量[tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex] 服从参数为[tex=0.643x1.0]+D9NhKovEP8INGz+KZnr1A==[/tex]的泊松分布,且[tex=8.286x1.357]LDgHReRZVA5QzpAkFsm37LX8N2D5xQRN5085qpjSnhc=[/tex], 则[tex=2.429x1.357]mcPoV0l2+P69G4jqQuIxgA==[/tex] A: 1 B: 1/2 C: 1/3 D: 1/4
- 设随机变量[tex=0.857x1.0]KGogyvwDAIJf/iL0H/9wjg==[/tex]与[tex=0.643x1.0]jDVSpgNhHe+VJmgvx3gg1Q==[/tex]独立,且均服从[tex=2.929x1.357]HQ1ThyvAmW6Uz+O4RYDQEQ==[/tex],(1) 求[tex=3.071x1.0]WuUf02fkmjNveiZiPSHwdQ==[/tex]的分布密度; (2) 证明[tex=4.786x1.357]rMJ8EWN2Sk/aPimpvGIRLw==[/tex]与[tex=3.5x1.357]Jf66/fujpMYUDtI1+vFE7g==[/tex]也相互独立.