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Suppose X and Y have joint pmf and marginal distributions given by X 2 0.30 0.25 0.55 Find Var[Y]. Y p(x,y) 5 10 0.10 Px(x) 0.30 1 0.20 3 0.10 0.05 0.15 PY(y) 0.60 0.40

Suppose X and Y have joint pmf and marginal distributions given by X 2 0.30 0.25 0.55 Find Var[Y]. Y p(x,y) 5 10 0.10 Px(x) 0.30 1 0.20 3 0.10 0.05 0.15 PY(y) 0.60 0.40

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Suppose X and Y have joint pmf and marginal distributions given by X 2 3 0.30 0.10 0.05 0.15 d) Find Var[Y]. e) Find E[XY]. f) Find Cov(X, Y). Y p(x,y) 5 10 Px(x) 0.30 1 0.20 0.10 0.25 0.55 py(y) 0.60 0.40 g) Find the Corr(X, Y). What can be said about the relationship between X and Y?
Transcribed Image Text:Suppose X and Y have joint pmf and marginal distributions given by X 2 3 0.30 0.10 0.05 0.15 d) Find Var[Y]. e) Find E[XY]. f) Find Cov(X, Y). Y p(x,y) 5 10 Px(x) 0.30 1 0.20 0.10 0.25 0.55 py(y) 0.60 0.40 g) Find the Corr(X, Y). What can be said about the relationship between X and Y?
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