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d) Use the moment generating function to find E[X], verifying your answer to part b). e) Find E[X2] directly. f) Use the moment generating function to find E[X2].

d) Use the moment generating function to find E[X], verifying your answer to part b). e) Find E[X2] directly. f) Use the moment generating function to find E[X2].

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Do parts d-g
1. Consider the function f(x) = (x+1)²/15 for x = -2, -1, 0, 1, 2 a) Verify that the function is a pdf. b) Find E[X] directly, that is evaluate sum[x*f(x)] c) Find the moment generating function for X. d) Use the moment generating function to find E[X], verifying your answer to part b). e) Find E[X2] directly. f) Use the moment generating function to find E[X²] . g) Find the variance of X and the standard deviation of X.
Transcribed Image Text:1. Consider the function f(x) = (x+1)²/15 for x = -2, -1, 0, 1, 2 a) Verify that the function is a pdf. b) Find E[X] directly, that is evaluate sum[x*f(x)] c) Find the moment generating function for X. d) Use the moment generating function to find E[X], verifying your answer to part b). e) Find E[X2] directly. f) Use the moment generating function to find E[X²] . g) Find the variance of X and the standard deviation of X.
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