The discrete random variable X has probability distribution given by -1 1 2 3 P(X=x) a a (a) Find the value of a (b) Write down E(X). (c) Find Var.(X).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 22E
Question

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Question 4:
The discrete random variable X has probability distribution given by
-1
1
3
P(X=x)
to
a
a
(a)
Find the value of a
(b)
Write down E(X).
(c)
Find Var.(X).
The random variable Y = 6- 2X.
(d)
Find Var. (Y).
(e)
Calculate P(X >Y)
2.
Transcribed Image Text:Question 4: The discrete random variable X has probability distribution given by -1 1 3 P(X=x) to a a (a) Find the value of a (b) Write down E(X). (c) Find Var.(X). The random variable Y = 6- 2X. (d) Find Var. (Y). (e) Calculate P(X >Y) 2.
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