A. $Y=\frac{X}{σ}+μ$
B. $Y=σX+μ$
C. $Y=\frac{X-μ}{σ}$
D. $Y=σX-μ$
10.设随机变量X~N(0,1),Y=2X+1,则Y服从( )A. N(1,4)B. N(0,1)C. N(1,1)D. N(1,2)
设 X sim N(mu, sigma^2),要使 Y sim N(0,1),则A. $Y = \sigma X + \mu$B. $Y = \sigma X
设随机变量X~N(0,1),Y~N(0,1),则X+Y()A. 服从正态分布N(0,1)B. 服从正态分布N(0,2)C. $$ 服从正态分布N(0, \sqr
设X~N(0,1),Y~χ²(n),且X,Y相互独立,则(X)/(sqrt(Y))sim t(n)A. 对B. 错
设 X sim N(0,1), Y sim x^2(n),且 X, Y 相互独立,则 (X)/(sqrt(Y)) sqrt(n) ~A. $t(n)$B. $t
设X~N(0,1),Y~N(1,1),且X与Y相互独立,则P(X+Y-1>0)= ____ .设X~N(0,1),Y~N(1,1),且X与Y相互独立,则P(X+
设Xsim N(0,1),Ysim x^2(n),且X,Y相互独立,则(X)/(sqrt(Y))sqrt(n)simA. F(1,n)B. F(n,1)C. t
设两个相互独立的随机变量X和Y分别服从正态分布N(0,1)和N(0,1),则( )(A)N(0,1)(B)N(0,1)(C)N(0,1)(D)N(0,1)
8.设随机变量X,Y相互独立,X~N(0,1),Y~N(1,1),则____.A. P{X+Y≤1}=1/2B. P{X+Y≤0}=1/2C. P{X-Y≤1}
设随机变量X和Y相互独立,且X~N(0,1),Y~N(1,1),则()A. $P\{X + Y \leq 0\} = \frac{1}{2}$B. $P\{X