Let (S, P) be the sample space in which S = {1,2,3,4} and P is given by P(1) 0.1, P(2) = 0.2, P(3) = 0.3, and P(4) = 0.4. Find the variance of the following random variables: a. X is the random variable defined by X(1) = X(2) = 1, X(3) = 2, and X(4) = 10. b. Y is the random variable defined by Y(k) = 2k (for k = 1,2,3,4). c. Z is the random variable defined by Z(k) = k² (for k = 1, 2, 3, 4).
Let (S, P) be the sample space in which S = {1,2,3,4} and P is given by P(1) 0.1, P(2) = 0.2, P(3) = 0.3, and P(4) = 0.4. Find the variance of the following random variables: a. X is the random variable defined by X(1) = X(2) = 1, X(3) = 2, and X(4) = 10. b. Y is the random variable defined by Y(k) = 2k (for k = 1,2,3,4). c. Z is the random variable defined by Z(k) = k² (for k = 1, 2, 3, 4).
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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
Transcribed Image Text:Let (S, P) be the sample space in which S = {1, 2, 3, 4} and P is given by P(1) = 0.1,
P(2) = 0.2, P(3) = 0.3, and P(4) = 0.4. Find the variance of the following random
variables:
a. X is the random variable defined by X(1) = X(2) = 1, X(3) = 2, and X(4) = 10.
b. Y is the random variable defined by Y(k) = 2k (for k= 1,2,3,4).
c. Z is the random variable defined by Z(k)= k² (for k
=
1, 2, 3, 4).
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