In: Statistics and Probability
Let X1 and X2 be two independent random
variables having a chi-squared distribution with degrees of freedom
n1 and n2, respectively. Let
Y1 = (X1) / (X1 + X2)
and Y2 = X1 + X2
(a) Find the joint p.d.f. of Y1 and Y2
(b) Find the marginal p.d.f. of each of Y1 and
Y2
(c) Are Y1 and Y2 independent ?
Justify your answer.