- #1
Sandbo
- 18
- 0
For X, Y and Z are iid,
I have actually seen many versions of solutions, and personally I can write out the multi-variable integration one:
∫∫∫f(x,y,z)dxdydz, for x from -inf to y, then y from -inf to z, and z for all values, generally.
But from a book there is another method:
P(X<Y<Z)=P(X<min(Y,Z))P(Y,Z), which is neat and easier to compute.
May I know how would it be possible?
Can I say P(X<Y<Z)=P(X<Y) and P(Y<Z)?
And what I could come out with was P(X<Y<Z)=P(X<Y)P(Y<Z), which looks incorrect, may I know what is wrong in this?Many thanks.
I have actually seen many versions of solutions, and personally I can write out the multi-variable integration one:
∫∫∫f(x,y,z)dxdydz, for x from -inf to y, then y from -inf to z, and z for all values, generally.
But from a book there is another method:
P(X<Y<Z)=P(X<min(Y,Z))P(Y,Z), which is neat and easier to compute.
May I know how would it be possible?
Can I say P(X<Y<Z)=P(X<Y) and P(Y<Z)?
And what I could come out with was P(X<Y<Z)=P(X<Y)P(Y<Z), which looks incorrect, may I know what is wrong in this?Many thanks.
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