Check the last option in 3). You can find all answers here.
a,d,f
Let X and Y be independent positive random variables. Let Z=X/Y . In what follows, all occurrences of x , y , z are assumed to be positive numbers.
1) Suppose that X and Y are discrete, with known PMFs, pX and pY . Then,
pZ|Y(z|y)=pX(?).
What is the argument in the place of the question mark?
----------------------?
2) Suppose that X and Y are continuous, with known PDFs, fX and fY . Provide a formula, analogous to the one in part (a), for fZ|Y(z|y) in terms of fX . That is, find A and B in the formula below.
fZ|Y(z|y)=AfX(B).
A= ?
B= ?
Which of the following is a formula for fZ(z) ?
fZ(z)=…
(Choose all that apply.)
a) fZ(z)=∫∞0fY,Z(y,z)dy
b) fZ(z)=∫∞0fY,Z(y,z)dz
c) fZ(z)=∫∞0fY(y)fZ,Y(z,y)dy
d) fZ(z)=∫∞0fY(y)fZ|Y(z|y)dy
e) fZ(z)=∫∞0fY(y)fX(yz)dy
f) fZ(z)=∫∞0yfY(y)fX(yz)dy
3 answers
I am still lost here. Can anyone give me a hint?
www.jiskha.com/questions/1822154/let-and-be-independent-positive-random-variables-let-in-what