A fair six-sided die is rolled 30 independent times. Let X be the number of ones and

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A fair six-sided die is rolled 30 independent times. Let X be the number of ones and Y the number of twos.
(a) What is the joint pmf of X and Y?
(b) Find the conditional pmf of X, given Y = y.
(c) Compute E(X2 − 4XY + 3Y2).

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Probability and Statistical Inference

ISBN: 978-0321923271

9th edition

Authors: Robert V. Hogg, Elliot Tanis, Dale Zimmerman

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Question Posted: Oct 12, 2015 08:46 AM

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A fair six-sided die is rolled 30 independent times. Let X be the number of ones and

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a X and Y have a trinomial distribution with n 30 p X 16 p Y 16 b The condit...View the full answer

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