

6.设(X1,X2,X3,X4)是来自正态总体N(0,2^2)的简单随机样本,记 =a((X)_(1)--|||-(2{x)_(2))}^2+b((3{x)_(
3.设X1,X2,X3,X4是来自正态总体N(0,2^2)的简单随机样本, X=a(X1-2X2)^2+b(3X2X2)^2+b(3X3-|||--4(x)_(
设样本X1,X2,X3,X4,X5来自总体N(0,1),设样本X1,X2,X3,X4,X5来自总体N(0,1),设样本X1,X2,X3,X4,X5来自总体N(0
设X1,X2,X3,X4,X5是来自正态总体X1,X2,X3,X4,X5的样本.(1) 求C使统计量X1,X2,X3,X4,X5服从X1,X2,X3,X4,X5
5.设X1,X2,X3,X4是总体 sim N(0,1) 的简单随机样本,则 =dfrac (sqrt {3)(X)_(1)}(sqrt {{{X)_(2)}^
[问答题]设x1,x2,x3,x4是来自正态总体N(0,22)的简单随机样本,当a,b为何值时,统计量X=a(x1-2x2)2+b(3x3-4x4)2服从χ2分
(第一空请填写小数)设X1,X2,X3是取自正态总体N(0,4)的简单随机样本, =a(({X)_(1)}^2+({X)_(2)}^2+({X)_(3)}^2)
例2 设X_(1),X_(2),X_(3),X_(4)为来自正态总体N(0,4)的简单随机样本,记X=a(X_(1)-2X_(2))^2+b(3X_(3)-4X
单选题设(X1,X2,X3,X4,X5)为总体(X1,X2,X3,X4,X5)的样本,(X1,X2,X3,X4,X5)服从F分布,其中c为常数,则c= (
4.第六章4(1),设样本x1,x2 x1,x4,x4,x,来自总体N(0,1), =(({x)_(2)+(x)_(2)+(x)_(2))}^2+(({x)_(