Answered: The random variable X takes the values…

The random variable X takes the values −2, 0 and 4 only. It is given that P(X=−2) = 2p, P(X= 0) =p and P(X= 4) = 3p.(i) Find p. (ii) Find E(X ) and Var(X ).

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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Question

The random variable X takes the values −2, 0 and 4 only. It is given that P(X=−2) = 2p, P(X= 0) =p and P(X= 4) = 3p.(i) Find p.

(ii) Find E(X ) and Var(X ).

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