Exercises 1. If the joint distribution function of a two dimensional random variable \( (X, Y) \) is given by Find i) Marginal density of \( X \) and \( Y \) ii) \( P(X<1 / Y<3) \) iii) \( P(X>Y) \) iv) \( P(X+Y<1) \)
Added by Tina R.
Close
Step 1
The joint distribution function of the two-dimensional random variable \( (X, Y) \) is given by: \[ F(x, y) = \begin{cases} (1 - e^{-x})(1 - e^{-y}) & \text{if } x > 0 \text{ and } y > 0 \\ 0 & \text{elsewhere} \end{cases} \] Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 95 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Problem 3: If the joint probability of X and Y is given by: f(x,y) = { 4xy for 0 ≤ x ≤ 1, 0 ≤ y ≤ 1 0 elsewhere Find: 1. The marginal density of X and the marginal density of Y. 2. Are X and Y independent? 3. The conditional distribution of X given Y = y, fX|Y(x|y). 4. The conditional expectation of X given Y = y, E[X|Y = y], for 0 ≤ y ≤ 1. 5. The variance of X given Y = y, V[X|Y = y] for 0 ≤ y ≤ 1.
Adi S.
The joint probability function of random variables X and Y is given by: y/x | 2 | 4 | 1 | 0.10 | 0.10 | 3 | 0.20 | 0.30 | 5 | 0.10 | 0.20 | (a) Give the marginal density of both X and Y as well as the probability distribution of X given Y = 3. (b) Give E(X) and Var(X). (c) Give E(X|Y=3) and Var(X|Y=3). (d) Give the covariance of X and Y.
Wei Z.
Let the random variables X and Y have the joint density function f(x,y) = {3(2 - x)y, if 0 < y < 1, and y < x < 2 - y; 0, otherwise. (a) Find the marginal density functions fX and fY of the random variables X and Y. (b) Calculate P(X + Y <= 1).
Ekaveera K.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD