Suppose that g is an easy probability density function to generate from, and h is a nonnegative function. Consider the following algorithm pseudo-code: Step 1. Generate Y ∼ g. Step 2. Generate E ∼ Exp(1) in the way that E = − log(U), U ∼ Unif(0, 1). Step 3. If E ≥ h(Y ), set X = Y . Otherwise go to Step 1. Step 4. Return X. This is a rejection algorithm and we want to find the density function of the generated samples. (d) Note that the density function f(x) in the samples is the conditional prob. f(x|accepted). Find f for X, subject to a constant. (e) With the results, write the pseudo-code for the density f(x) = c/x2 * e-(x^2)/2, x>1 (Hint. Find g and h to generate f. For g, you may consider the inversion algorithm.)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section: Chapter Questions
Problem 52RE
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Suppose that g is an easy probability density function to generate from, and h is a nonnegative function. Consider the following algorithm pseudo-code:


Step 1. Generate Y ∼ g.

Step 2. Generate E ∼ Exp(1) in the way that E = − log(U), U ∼ Unif(0, 1).

Step 3. If E ≥ h(Y ), set X = Y . Otherwise go to Step 1.

Step 4. Return X.
This is a rejection algorithm and we want to find the density function of the generated
samples.

(d) Note that the density function f(x) in the samples is the conditional prob. f(x|accepted).
Find f for X, subject to a constant.

(e) With the results, write the pseudo-code for the density
f(x) = c/x2 * e-(x^2)/2, x>1
(Hint. Find g and h to generate f. For g, you may consider the inversion algorithm.)

Suppose that g is an easy probability density function to generate from, and h is a non-
negative function. Take a close look at the following algorithm pseudo-code:
Step 1. Generate Y ~ g.
Step 2. Generate E -
Exp(1) in the way that E = – log(U), U ~ Unif(0, 1).
Step 3. If E > h(Y), set X = Y. Otherwise go to Step 1.
Step 4. Return X.
This is a rejection algorithm and we want to find the density function of the generated
samples.
-Nete that E~Eæp(). Whatisthe probabitity that P(E < t) for any constant
t> 0?
Given Y- , what is the probability that Y will be-aecepted?
What is the joint probability that P(YSI,Yis accepted)!
(d) Note that the density function f(x) in the samples is the conditional prob. f(x|accepted).
Find f for X, subject to a constant.
(e) With the results, write the pseudo-code for the density
f(r) =
2/2
x > 1.
(Hint. Find g and h to generate f. For g, you may consider the inversion algorithm.)
Transcribed Image Text:Suppose that g is an easy probability density function to generate from, and h is a non- negative function. Take a close look at the following algorithm pseudo-code: Step 1. Generate Y ~ g. Step 2. Generate E - Exp(1) in the way that E = – log(U), U ~ Unif(0, 1). Step 3. If E > h(Y), set X = Y. Otherwise go to Step 1. Step 4. Return X. This is a rejection algorithm and we want to find the density function of the generated samples. -Nete that E~Eæp(). Whatisthe probabitity that P(E < t) for any constant t> 0? Given Y- , what is the probability that Y will be-aecepted? What is the joint probability that P(YSI,Yis accepted)! (d) Note that the density function f(x) in the samples is the conditional prob. f(x|accepted). Find f for X, subject to a constant. (e) With the results, write the pseudo-code for the density f(r) = 2/2 x > 1. (Hint. Find g and h to generate f. For g, you may consider the inversion algorithm.)
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