Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Probability question that I just can't solve.

  1. Sep 14, 2006 #1

    My formal mathematical training is minimal and it is for this reason that I tend to deal with these types of problems on a highly intuitive and abstract level, please therefore forgive my clear ignorance both respect to the way I describe this problem and the fact that I can't find a solution for it.

    We have two positively correlated variables (I suppose the best way to illustrate this fact is with a correlation coefficient of say 0.7; would I be right in supposing this?) furthermore both variables have a standard normal distribution. My question is, suppose these two variables fluctuate over time and in the first period variable A moves 1 s.d. higher it must follow that variable B's mean is no longer 0 but rather another value (is this correct???).

    Any help will be much appreciated.

    Thank you all.
  2. jcsd
  3. Oct 16, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper

    Last edited: Oct 17, 2006
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook