The discrete random variable X has the probability distribution given by: x -3 1 3 5 7 P(X=x) 2r 0.25 0.2 0.1 r a. Determine the following probability: P(X=-3) = ? b. What is the expected value of the random variable X? c. What is the variance of the random variable X?
The discrete random variable X has the probability distribution given by: x -3 1 3 5 7 P(X=x) 2r 0.25 0.2 0.1 r a. Determine the following probability: P(X=-3) = ? b. What is the expected value of the random variable X? c. What is the variance of the random variable X?
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:
x | -3 | 1 | 3 | 5 | 7 |
---|---|---|---|---|---|
P(X=x) | 2r | 0.25 | 0.2 | 0.1 | r |
a. Determine the following probability: P(X=-3) = ?
b. What is the expected value of the random variable X?
c. What is the variance of the random variable X?
d. Find the variance of the random variable Y, where Y=−3X+(1/4)
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