Marginal Density question

[kavakava9]

Can anyone tell me how and why? you would find the marginal density function for y in this joint distribution problem.


f(x,y) = 3/8 (1-x+2y) 0 <= x <= y <= 2-x; 0 elsewhere

[Generalshamu]

Just integrate out dx fromt he equation to get the marginal density fy(y)...

You would do this so that you can find Variance(Y) or any moment of Y, etc....