Consider the unit cirlce in the plane; that is, the set of all points within a distance of 1 of the origin:     A= {(x, y) : x^2 + y^2 ≤ 1}. Suppose we choose a point (X, Y ) uniformly at random from S. What is the pdf for the distance B = √X^2 + Y ^2 from the origin to this point?   Hint given: What is the cdf of B

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...
icon
Related questions
Question

Consider the unit cirlce in the plane; that is, the set of all points within a distance
of 1 of the origin:     A= {(x, y) : x^2 + y^2 ≤ 1}.
Suppose we choose a point (X, Y ) uniformly at random from S. What is the pdf for the
distance B = √X^2 + Y ^2 from the origin to this point?   Hint given: What is the cdf of B?

Expert Solution
Step 1: Find the CDF of B:

To find the probability density function (pdf) for the distance B=X2+Y2 from the origin to a point randomly chosen from the unit circle A={(x,y):x2+y21}, we can start by finding the cumulative distribution function (CDF) of B, and then differentiate it to obtain the pdf.


The CDF of B is given by:


FB(b)=P(Bb)


In this case, we want to find the probability that the distance B is less than or equal to some value b. Since we're dealing with a point chosen randomly from the unit circle, this probability is simply the fraction of the unit circle's area that lies within a circle of radius b.


The area of the unit circle is π12=π, and the area of the circle with radius b is πb2. Therefore, the CDF can be expressed as:


FB(b)=πb2π=b2

steps

Step by step

Solved in 3 steps

Blurred answer
Similar questions
Recommended textbooks for you
A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability
A First Course in Probability
Probability
ISBN:
9780321794772
Author:
Sheldon Ross
Publisher:
PEARSON