In: Statistics and Probability
Suppose that Y1 and Y2 are jointly distributed with joint pdf:
f(y1,y2) ={cy2. for 0 ≤ y1 ≤ y2 ≤ 1
0. otherwise}
(1) Find c value.
(2) Are Y1 and Y2 independent? Justify your answer.
(3) ComputeCov(Y1,Y2).
(4) Find the conditional density of Y1 given Y2=y2.
(5) Using (d), find the conditional expectation E (Y1|Y2).
(6) Suppose that X1=Y1+Y2, and X2= 2Y2. What is the joint density ofX1andX2?