Let X denote a random variable that takes on any of the values -1, 0, 1 with respective probabilities P(X = −1) = 0.2,P(X = 0) = 0.5,P(X = 1) = 0.3. Compute E(X2). (a) 0.2 (b) 0.3 (c) 0.4 (d) 0.5 (e) None of the above

Let X denote a random variable that takes on any of the values -1, 0, 1 with respective probabilities P(X = −1) = 0.2,P(X = 0) = 0.5,P(X = 1) = 0.3. Compute E(X2). (a) 0.2 (b) 0.3 (c) 0.4 (d) 0.5 (e) None of the above

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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Question

Let X denote a random variable that takes on any of the values -1, 0, 1 with respective probabilities P(X = −1) = 0.2,P(X = 0) = 0.5,P(X = 1) = 0.3. Compute E(X2).
(a) 0.2
(b) 0.3
(c) 0.4
(d) 0.5
(e) None of the above

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