Suppose X is a random variable with mean 10 and variance 16. Suppose Y is a random variable with mean 20 and variance 9. X and Y are independent. What is the standard deviation of the difference X - Y? square root of 7 None of the other choices is correct 7 25

Suppose X is a random variable with mean 10 and variance 16. Suppose Y is a random variable with mean 20 and variance 9. X and Y are independent. What is the standard deviation of the difference X - Y? square root of 7 None of the other choices is correct 7 25

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

Suppose X is a random variable with mean 10 and variance 16.
Suppose Y is a random variable with mean 20 and variance 9.
X and Y are independent.
What is the standard deviation of the difference X - Y?
square root of 7
25
5
None of the other choices is correct
7

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