MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question
X is a random variable having a probability distribution with a mean/expected value of E(X) = 26.1 and a variance of Var(X) = 49. Consider the following random variables. A = 3X B=3X-1 C=-1X +8 Answer parts (a) through (c). Part (a) Find the expected value and variance of A. E(A) = (use two decimals) Var(A) = (use two decimals) Part (b) Find the expected value and variance of B. E(B) (use two decimals) Var (B) = (use two decimals) Part (c) Find the expected value and standard deviation of C. E(C)= (use two decimals) SD(C) (use two decimals)
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Transcribed Image Text:X is a random variable having a probability distribution with a mean/expected value of E(X) = 26.1 and a variance of Var(X) = 49. Consider the following random variables. A = 3X B=3X-1 C=-1X +8 Answer parts (a) through (c). Part (a) Find the expected value and variance of A. E(A) = (use two decimals) Var(A) = (use two decimals) Part (b) Find the expected value and variance of B. E(B) (use two decimals) Var (B) = (use two decimals) Part (c) Find the expected value and standard deviation of C. E(C)= (use two decimals) SD(C) (use two decimals)
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