若随机变量F服从F(n1,n2),则1/F服从分布( )
A: F(n1,n2)
B: 1/F(n1,n2)
C: F(n2,n1)
D: 1/F(n2,n1)
A: F(n1,n2)
B: 1/F(n1,n2)
C: F(n2,n1)
D: 1/F(n2,n1)
举一反三
- 若随机变量F服从F(n1,n2),则1/F服从分布( ) A: F(n1,n2) B: 1/F(n1,n2) C: F(n2,n1) D: 1/F(n2,n1)
- 对于给定的正数a(0〈a〈1),设za,χ2a(n),ta(n),Fa(n1,n2)分别是标准正态分布,χ2(n),t(n),F(n1,n2)分布的上a分位点,则下面的结论中不正确的是() A: z(n)-z(n) B: χ(n)=-χ(n) C: t(n)=-t(n) D: F(n,n)=1/F(n,n)
- 下列关于时间价值系数的关系式,表达正确的有()()A.(F/A,i,n)=()(P/A,i,n)×(F/P,i,n)()B.(F/P,i,n)=(F/P,i,n1)×(F/P,i,n2),其中n1+n2=n()C.(P/F,i,n)=(P/F,i,n1)+(P/F,i,n2),其中n1+n2=n()D.(P/A,i,n)=(P/F,i,n)×(A/F,i,n)()E.()1/(F/A,i,n)=(F/A,i,1/n)A.()A.(F/A,i,n)=()(P/A,i,n)×(F/P,i,n)()B.()B.(F/P,i,n)=(F/P,i,n1)×(F/P,i,n2),其中n1+n2=n()C.()C.(P/F,i,n)=(P/F,i,n1)+(P/F,i,n2),其中n1+n2=n()D.()D.(P/A,i,n)=(P/F,i,n)×(A/F,i,n)()E.()E.()1/(F/A,i,n)=(F/A,i,1/n)
- 下面N×N的笛卡尔积的子集中,哪些可以构成函数? A: {(n1,n2) | n1,n2∈N and n1+n2 <10} B: {(n1,n2) | n1,n2∈N and n2 = n1^2} C: {(n1,n2) | n1,n2∈N and n1 = n2^2} D: {(n1,n2) | n1,n2∈N and n2为小于n1的素数个数}
- 下面的关系哪些构成函数.(1){(n1,n2)|n1,n2∈N,n1+n2<10};(2){(n1,n2)|n1,n2∈R,n2=n12};(3){(n1,n2)|n1,n2∈R,n22=n1).