
Advanced Statistics Advanced Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
November 14th, 2012, 11:45 AM  #1 
Joined: Sep 2012 Posts: 3 Thanks: 0  Discrete Bivariate Random Vectors
Consider the experiment of rolling two tetrahedra that are unfair in the sense that each has the following probabilities for each of the four faces: P{1 dot}=1/10 P{2 dots}=2/10 P{3 dots}=3/10 P{4 dots}=4/10 Let X be the total of the outcomes in the two tetrahedra and Y be the absolute difference between their outcomes. Obtain the joint probability mass function of (X,Y). So I am confused on how to do the probabilities since it is a biased experiment. My professor taught us how to do it for two fair tetrahedra but when I do the same method except with the biased probabilities I can't seem to get anything right. How exactly do you do this? 
November 14th, 2012, 01:18 PM  #2 
Global Moderator Joined: May 2007 Posts: 3,817 Thanks: 27  Re: Discrete Bivariate Random Vectors
Since there are only eight possible outcomes, why not list them all with their probabilities?


Tags 
bivariate, discrete, random, vectors 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Discrete Random Variable  Keroro  Advanced Statistics  2  August 17th, 2012 01:22 PM 
Discrete random variable  hoyy1kolko  Algebra  1  February 13th, 2011 06:32 AM 
Discrete random variable  hoyy1kolko  Algebra  1  February 13th, 2011 06:08 AM 
help with random discrete variables...  sneaky  Algebra  0  September 30th, 2010 10:13 AM 
Discrete random variable.  adbroadband  Algebra  1  January 31st, 2008 10:49 AM 