1. Statistics
2. Descriptive Statistics
3. 28252

The joint density of X and Y is given by

f(x,y)= {xe to the power -(z+y) x>0, y>0
0 otherwise.

Are X and Y independent? What if f(x,y) were given by

f(x,y)= {2 0<x<y, 0<y<1
0 otherwise.