Let the pmf p(x) be positive at x = 1, 0, 1 and zero elsewhere. (a) If
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Let the pmf p(x) be positive at x = −1, 0, 1 and zero elsewhere.
(a) If p(0) = 1/4 , find E(X2).
(b) If p(0) = 1/4 and if E(X) = 1/4 , determine p(−1) and p(1).
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Related Book For 
Introduction To Mathematical Statistics
ISBN: 9780321794710
7th Edition
Authors: Robert V., Joseph W. McKean, Allen T. Craig
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