Mathematical Statistics and Data Analysis
3rd Edition
ISBN: 9781111793715
Author: John A. Rice
Publisher: Cengage Learning
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Question
Chapter 3.8, Problem 15P
a.
To determine
Find c.
b.
To determine
Sketch the joint density.
c.
To determine
Find
d.
To determine
Find the marginal densities of X and Y and also check whether the random variables are independent or not.
e.
To determine
Find the conditional densities.
Expert Solution & Answer
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Students have asked these similar questions
Suppose that X and Y have a joint probability density function
f(x,y)= 1, if0<y<1,y<x<2y; 0, otherwise.
(a) Compute P(X + Y less than or equal 1).
(b) Find the marginal probability density functions for X and Y , respectively.
(c) Are X and Y independent?
Suppose that the random variables X and Y have a joint density function given by:
f(x,y)={cxy for 0≤x≤2 and 0≤y≤x, 0 otherwise
c=1/2
P(X < 1),
Determine whether X and Y are independent
Consider the variables X and Y with the following joint probability density:f(x,y)=275(2x2y+xy2)for0≤x≤3and1≤y≤2
a)Calculate marginal probability density: fX(x).
b)Calculate marginal probability density: fY(y).
c)Compute E[X], E[Y], and E[X+Y].
d)Compute E[X2], E[Y2], E[XY], and E[(X + Y)2]e)Compute Var (X+Y), Var(X), and Var(Y) and check that:Var (X+Y) ≠ Var(X) + Var(Y).
Chapter 3 Solutions
Mathematical Statistics and Data Analysis
Ch. 3.8 - Prob. 1PCh. 3.8 - Prob. 2PCh. 3.8 - Prob. 3PCh. 3.8 - Prob. 4PCh. 3.8 - Prob. 5PCh. 3.8 - Prob. 6PCh. 3.8 - Prob. 7PCh. 3.8 - Prob. 8PCh. 3.8 - Prob. 9PCh. 3.8 - Prob. 10P
Ch. 3.8 - Prob. 11PCh. 3.8 - Prob. 12PCh. 3.8 - Prob. 13PCh. 3.8 - Prob. 14PCh. 3.8 - Prob. 15PCh. 3.8 - Prob. 16PCh. 3.8 - Prob. 17PCh. 3.8 - Prob. 18PCh. 3.8 - Prob. 19PCh. 3.8 - Prob. 20PCh. 3.8 - Prob. 22PCh. 3.8 - Prob. 23PCh. 3.8 - Prob. 24PCh. 3.8 - Prob. 25PCh. 3.8 - Prob. 27PCh. 3.8 - Prob. 28PCh. 3.8 - Prob. 29PCh. 3.8 - Prob. 30PCh. 3.8 - Prob. 31PCh. 3.8 - Prob. 32PCh. 3.8 - Prob. 33PCh. 3.8 - Prob. 34PCh. 3.8 - Prob. 35PCh. 3.8 - Prob. 38PCh. 3.8 - Prob. 39PCh. 3.8 - Prob. 44PCh. 3.8 - Prob. 45PCh. 3.8 - Prob. 46PCh. 3.8 - Prob. 47PCh. 3.8 - Prob. 48PCh. 3.8 - Prob. 50PCh. 3.8 - Prob. 51PCh. 3.8 - Prob. 52PCh. 3.8 - Prob. 53PCh. 3.8 - Prob. 54PCh. 3.8 - Prob. 55PCh. 3.8 - Prob. 56PCh. 3.8 - Prob. 57PCh. 3.8 - Prob. 58PCh. 3.8 - Prob. 60PCh. 3.8 - Prob. 61PCh. 3.8 - Prob. 62PCh. 3.8 - Prob. 63PCh. 3.8 - Prob. 64PCh. 3.8 - Prob. 65PCh. 3.8 - Prob. 66PCh. 3.8 - Prob. 67PCh. 3.8 - Prob. 68PCh. 3.8 - Prob. 69PCh. 3.8 - Prob. 70PCh. 3.8 - Prob. 71PCh. 3.8 - Prob. 72PCh. 3.8 - Prob. 73PCh. 3.8 - Prob. 74PCh. 3.8 - Prob. 75PCh. 3.8 - Prob. 76PCh. 3.8 - Prob. 77PCh. 3.8 - Prob. 78PCh. 3.8 - Prob. 79PCh. 3.8 - Prob. 80PCh. 3.8 - Prob. 81P
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