Solving Order Statistics with Three Uniformly Distributed Random Variables

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Discussion Overview

The discussion revolves around calculating the probability that three independent random variables, uniformly distributed on the interval [0,1], are not within a specified distance d of each other. The context includes order statistics and potential generalizations to higher dimensions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant poses a problem involving three random variables generated on a spinning fair wheel and seeks help in determining the probability that none of the values are within ±d of each other.
  • Another participant expresses interest in the problem and suggests it may have applications in a two-dimensional context, relating it to clustering in a game of pool.
  • A different participant notes that while order statistics are not necessary for solving the problem, several cases need to be considered, particularly regarding the placement of values relative to the endpoints and each other.

Areas of Agreement / Disagreement

Participants appear to have varying levels of understanding and approaches to the problem, with no consensus on a specific solution or methodology. Some express confusion while others suggest different perspectives on how to tackle the problem.

Contextual Notes

Participants mention the need to consider multiple cases based on the positioning of random variables, indicating that assumptions about the distribution and arrangement of values are crucial to the problem's resolution.

Who May Find This Useful

Individuals interested in probability theory, order statistics, and applications of random variables in mathematical modeling may find this discussion relevant.

robert5
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Three random variables are generated X1, X2, X3 on a spnning fair wheel three times. these variables are independent and uniformaly distributes on [0,1]. find probability that these values are none within +-d of each other where 0<=Y1<=Y2<=Y3<=1 is order statistics for randon variables.
fY2Y3(y2,y3) = 2!fx(y) . fX(y) =

what is fX(y)? can some one help?

Also,

Pr[d<=Y2<=(1.2d), (y2+d)<=Y3<=(1-d)] =

where y2 and y3 be placed in [0, 1]

I can understand it but don't know how to do it...
 
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Hi Guys,

Any help ?
 
I'm interested in knowing how to do this, too. If the problem is asking what I think it is, it seems that it could be generalized to 2-dimensions. That might provide a simplified model of the number of clusters of balls remaining after the break shot in a game of pool (pocket billiards)...
 
robert5 said:
Three random variables are generated X1, X2, X3 on a spnning fair wheel three times. these variables are independent and uniformaly distributes on [0,1]. find probability that these values are none within +-d of each other where 0<=Y1<=Y2<=Y3<=1 is order statistics for randon variables.

You don't need to the order statistics to solve this, however you will need to consider several separate cases where x1 or x2 fall within d of the endpoints or within 2d of each other. Also do the values fall on an interval or on a circle. The latter case will be a bit simpler to solve.
 
thanks your solving problems
 

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