3. The continuous random variables X and Y have known joint probability density function f (x,y) given by £x(x, y) = [(x+y)/8 0≤x≤2,0sys2 0 otherwise. Define the random variable z as Z=max(X,Y). a) Determine the probability density function fz(z) of the random variable z. b) Determine the probability Pr{0.5

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.CR: Chapter 13 Review
Problem 30CR
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3. The continuous random variables X and Y have known
joint probability density function f(x,y) given by
(x+y)/8 0≤ x ≤ 2,0≤ y ≤2
£xy (x, y) =
3) = {(x + 3)
otherwise. Define the random variable z
as
Z = max(X,Y). a) Determine the probability density function
fz(2) of the random variable z. b) Determine the probability
Pr{0.5<Z ≤1.5}. c) Determine E{Z} and var{Z}.
Transcribed Image Text:3. The continuous random variables X and Y have known joint probability density function f(x,y) given by (x+y)/8 0≤ x ≤ 2,0≤ y ≤2 £xy (x, y) = 3) = {(x + 3) otherwise. Define the random variable z as Z = max(X,Y). a) Determine the probability density function fz(2) of the random variable z. b) Determine the probability Pr{0.5<Z ≤1.5}. c) Determine E{Z} and var{Z}.
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