(a) Find E(X), Var(X), SD(X).
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 9E
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Q20: Roll one fair 6-sided dice, let X be the number observed.
(a) Find E(X), Var(X), SD(X).
(b) Let Y be the sum of 10 independent rolls of fair dice. Find E(Y), Var(Y), SD(Y).
(c) Calculate the following quantities: E(X2), E(3X+2), E((Y+2)2), Var(-X), SD(2Y).
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