Given the joint probabilities of two discrete random variables (X, Y) as below. f(1,1)=4/20, f(1,2)= 3/20, f(1,3)= 1/20, f(2,1)= 2/20, f(2,2)=1/20, f(2,3)= 2/20, f(3,1)= 2/20, f(3,1)=3/20, f(3,3)= 2/20 . Find. i) The mean of a random variable X ii) The variance of random variable X.
Given the joint probabilities of two discrete random variables (X, Y) as below. f(1,1)=4/20, f(1,2)= 3/20, f(1,3)= 1/20, f(2,1)= 2/20, f(2,2)=1/20, f(2,3)= 2/20, f(3,1)= 2/20, f(3,1)=3/20, f(3,3)= 2/20 . Find. i) The mean of a random variable X ii) The variance of random variable X.
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.4: Expected Value
Problem 1E: If a game gives payoffs of $10 and $100 with probabilities 0.9 and 0.1, respectively, then the...
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Given the joint probabilities of two discrete random variables (X, Y) as below.
f(1,1)=4/20, f(1,2)= 3/20, f(1,3)= 1/20, f(2,1)= 2/20, f(2,2)=1/20, f(2,3)= 2/20,
f(3,1)= 2/20, f(3,1)=3/20, f(3,3)= 2/20 . Find. i) The mean of a random variable X
ii) The variance of random variable X.
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