What is the expected value of X²?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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The density function of a certain random variable is
(22) (0.2) 4² (0.8)22-4²,
if x = 0, 1, ²,...,
f(x) =
otherwise
What is the expected value of X²?
Transcribed Image Text:The density function of a certain random variable is (22) (0.2) 4² (0.8)22-4², if x = 0, 1, ²,..., f(x) = otherwise What is the expected value of X²?
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