Re: Joint density proofing

Hey cummings123321.

What is the definition of the marginal density functions for X and Y in terms of the joint distribution? You need to use the relationship between these and the joint to show the independence criterion (i.e P(A and B) = P(A)P(B)).

Re: Joint density proofing

I don't quite undetstand why the density of X is f/(∫f(t)dt, now i know is MDF are f(x)=∫f(x)g(x)dy and f(x)=∫f(x)g(x)dx , how should i get the density from MDF to PDF??

Re: Joint density proofing

Can you link the product of the X and Y marginals to the joint distribution?