设随机变量X~N(1, 1),则Y=2X+1服从()分布
A: N(3, 3)
B: N(3, 4)
C: N(3, 5)
D: N(1, 3)
A: N(3, 3)
B: N(3, 4)
C: N(3, 5)
D: N(1, 3)
举一反三
- 设X~N(1, 2), Y~N(-1, 3),且X与Y相互独立,则2X-Y~( ) A: N(3, 8) B: N(3, 5) C: N(3, 11) D: N(3,25)
- 已知x(n)={1, 2, 3},y(n)={1, 2, 1},则x(n)*y(n)=________。(下划线表示n=0) A: {1, 4, 8, 8, 3} B: {1, 4, 8, 8, 3} C: {1, 4, 8, 8, 3} D: {1, 4, 8, 8, 3}
- 设随机变量X 服从标准正态分布N(0, 1), 则Y = 2X – 1服从( ) A: N(0,1) B: N(-1,4) C: N(-1, 1) D: N(-1, 3)
- 设随机变量(X,Y)~N(1, 2; 3, 4; 0), 则2X-Y服从的分布为
- 设随机变量(X,Y)~N(1, 2; 3, 4; 0), 则2X-Y服从的分布为 A: N(0,2) B: N(0,10) C: N(0,16) D: N(0.8)