(a) Suppose that X1,..., X, are independent Laplace random variables, and let Y, = X1 + ……+ Xn. Find the mean, variance, and mgf of Yn. (b) Let Yn – HY. be the standardized version of Yn. Find the mgf of Zn.
(a) Suppose that X1,..., X, are independent Laplace random variables, and let Y, = X1 + ……+ Xn. Find the mean, variance, and mgf of Yn. (b) Let Yn – HY. be the standardized version of Yn. Find the mgf of Zn.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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M-3 please help me with the below problem with step by step explanation clearly.
Needed all parts clearly please.
![3. A random variable X has the Laplace distribution if it follows the pdf
S(2) = H,
On the midterm exam you verified that the mgf of a Laplace distributed X is
1
-00 <x < 0.
1
Mx(t)
1- t2
and so its mean is 0 and its variance is 2.
(a) Suppose that X1,...,X, are independent Laplace random variables, and let Y, = X1+...+
Xn. Find the mean, variance, and mgf of Y,.
(b) Let
Yn – HYn
Zn
be the standardized version of Yn. Find the mgf of Zn.
(c) Show that in the limit as n → 00, the mgfs of Zn converge to the mgf of a standard normal
random variable. (This is a version of the Central Limit Theorem.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F91155ea5-7aa4-452c-b907-acce4aed7032%2F8a279849-2600-4abe-9cd3-c4a426db5763%2Fj8tchko_processed.png&w=3840&q=75)
Transcribed Image Text:3. A random variable X has the Laplace distribution if it follows the pdf
S(2) = H,
On the midterm exam you verified that the mgf of a Laplace distributed X is
1
-00 <x < 0.
1
Mx(t)
1- t2
and so its mean is 0 and its variance is 2.
(a) Suppose that X1,...,X, are independent Laplace random variables, and let Y, = X1+...+
Xn. Find the mean, variance, and mgf of Y,.
(b) Let
Yn – HYn
Zn
be the standardized version of Yn. Find the mgf of Zn.
(c) Show that in the limit as n → 00, the mgfs of Zn converge to the mgf of a standard normal
random variable. (This is a version of the Central Limit Theorem.)
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