The discrete random variable X has the probability function, where k is constant х%3D 2,4, 6, 8 kx f(x) =- otherwise Find the constant k A) 1/20 в) 30 c) 20 D) 1/30

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 20E
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Question
The discrete random variable X has the probability function, where k is constant
x = 2, 4, 6, 8
kx
f(x) =
otherwise
Find the constant k
A
1/20
30
20
D
1/30
Transcribed Image Text:The discrete random variable X has the probability function, where k is constant x = 2, 4, 6, 8 kx f(x) = otherwise Find the constant k A 1/20 30 20 D 1/30
Suppose that the random variable X has the probability density function
c(1-
- x2)
for - 1< x <1
f(x) = {
elsewhere
What is the variance of X
A
1/3
1/5
c) 1/2
1/4
Transcribed Image Text:Suppose that the random variable X has the probability density function c(1- - x2) for - 1< x <1 f(x) = { elsewhere What is the variance of X A 1/3 1/5 c) 1/2 1/4
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