The discrete random variable X has the probability distribution given by: -4 -2 2 4 P(X= x) 0.3 3k k 0.35 3k a. Determine the following probability: P(X=-2) = ? Answer in exact fraction or exact decimals b. What is the expected value of the random variable X? Answer in exact fraction or exact decimals c. What is the variance of the random variable X? Answer in exact fraction or exact decimals d. Find the variance of the random variable Y, where Y = -2X – Answer in exact fraction or exact decimals

The discrete random variable X has the probability distribution given by: -4 -2 2 4 P(X= x) 0.3 3k k 0.35 3k a. Determine the following probability: P(X=-2) = ? Answer in exact fraction or exact decimals b. What is the expected value of the random variable X? Answer in exact fraction or exact decimals c. What is the variance of the random variable X? Answer in exact fraction or exact decimals d. Find the variance of the random variable Y, where Y = -2X – Answer in exact fraction or exact decimals

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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The discrete random variable X has the probability distribution given by:
-4
-2
2
4
6
P(X = x)
0.3
3k
k
0.35
3k
a. Determine the following probability: P(X=-2) = ?
Answer in exact fraction or exact decimals
b. What is the expected value of the random variable X?
Answer in exact fraction or exact decimals
c. What is the variance of the random variable X?
Answer in exact fraction or exact decimals
d. Find the variance of the random variable Y, where Y = -2X –
Answer in exact fraction or exact decimals
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