欢迎来到天天文库
浏览记录
ID：34448420
大小：208.77 KB
页数：7页
时间：2019-03-06
《北京工业大学2008-2009概率论与数理统计期末试卷a》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、 2008-2009 ( ) A 2009 7 3 100 .(302)1.A 0.5,AB 0.2, A B ?:2.X∼B(5,0.4)YX ,X+Y∼:P(X+Y=4)=?:E(XY)=?:3. DZ
2、:1:2 DZ DZ:4.X DZ:λe−λx,x≥0,f(x)=λ0x<0,2EX=12,λ=?:P(13、 ?:8.2X−µX∼N(µ,σ),Y=σ,Y∼?:Zαα(0<α<1).:P{4、Y5、≤Z0.025}=?:9.( : ) X( g)X∼N(µ,σ2),9, DZ26.25, DZ0.81.2σDZ0.95 DZ?:µDZ0.95 DZ?:1( ) (14)XDZ2Y∼N(2,4),XY (1).Z=26、Y+1 fZ(z).(2).P(max{X,Y}≥2).(3).Var(2X+3Y).2 (14)642(1).2 (2).10 41 23 22 3 (14)(X,Y)a(2x+y),0≤x≤y≤2,f(x,y)=0,(1).a.(2).XÆfX(x)YÆfY(y).(3)7、.XY .(4).XYρ.4 .(14)X1,X2,···,XnX ,XDZ(1+θ)xθx∈(0,1)f(x)=(θ>−1)0(1).θ.θ(2).∗.θ θ5 (14) 22X( ):X∼N(µ,σ),(µ,σ). 75DZ 10DZ 9 71,98,91,75,77,58,818、,76,79 (1).α=0.05,DZ ?(2).α=0.05,DZ ?6t tn(α)nα0.100.050.025x11.281.64561.43981.94322.4469Φ(x)0.84130.900.9571.41491.89462.3646x1.962381.39681.85952.3060Φ(x)0.9750.97720.998791.38301.83312.2622χ22 χn(α)nα0.9750.950.900.100.050.09、2561.2371.6352.20410.64512.59214.44971.6902.1672.83312.01714.06716.01382.1802.7333.49013.36215.50717.53592.7003.3254.16814.68416.91919.0237
3、 ?:8.2X−µX∼N(µ,σ),Y=σ,Y∼?:Zαα(0<α<1).:P{
4、Y
5、≤Z0.025}=?:9.( : ) X( g)X∼N(µ,σ2),9, DZ26.25, DZ0.81.2σDZ0.95 DZ?:µDZ0.95 DZ?:1( ) (14)XDZ2Y∼N(2,4),XY (1).Z=2
6、Y+1 fZ(z).(2).P(max{X,Y}≥2).(3).Var(2X+3Y).2 (14)642(1).2 (2).10 41 23 22 3 (14)(X,Y)a(2x+y),0≤x≤y≤2,f(x,y)=0,(1).a.(2).XÆfX(x)YÆfY(y).(3)
7、.XY .(4).XYρ.4 .(14)X1,X2,···,XnX ,XDZ(1+θ)xθx∈(0,1)f(x)=(θ>−1)0(1).θ.θ(2).∗.θ θ5 (14) 22X( ):X∼N(µ,σ),(µ,σ). 75DZ 10DZ 9 71,98,91,75,77,58,81
8、,76,79 (1).α=0.05,DZ ?(2).α=0.05,DZ ?6t tn(α)nα0.100.050.025x11.281.64561.43981.94322.4469Φ(x)0.84130.900.9571.41491.89462.3646x1.962381.39681.85952.3060Φ(x)0.9750.97720.998791.38301.83312.2622χ22 χn(α)nα0.9750.950.900.100.050.0
9、2561.2371.6352.20410.64512.59214.44971.6902.1672.83312.01714.06716.01382.1802.7333.49013.36215.50717.53592.7003.3254.16814.68416.91919.0237
此文档下载收益归作者所有
