1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Random Walk and Statistics, last time we hit 0

  1. Feb 23, 2010 #1
    This is for my Statistics and Stochastic Processes class, we are learning about random walk

    1. Let p<q where p is success (+1) and q is failure (-1). Let T=last time we hit 0 (T[tex]\geq[/tex]0) Find P(T=t)

    Then using the answer from the above question, make up a formula for [tex]\sum(2n choose n)*x^{n}[/tex]

    3. The attempt at a solution
    I know the law of large numbers says that the random walk will eventually enter a downward cone and never leave, meaning that at a long enough time the amount of loses will be greater than the wins because of p and q. But I don't know where this gets me.
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted

Similar Threads - Random Walk Statistics Date
Show Random Walk Respects Identity Apr 13, 2017
Expected number of steps random walk Dec 13, 2016
Random Walk in Arbitrary Dimension Apr 18, 2015
Random walk? May 7, 2013
Random walk on circle Mar 24, 2013