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 July 25th, 2017, 11:25 AM #1 Member   Joined: Jan 2017 From: California Posts: 80 Thanks: 8 Definition of a random variable Hi guys Definition from book: A random variable $X$ is defined to be a numerically valued function of the elementary events $Ei$ what does it mean it plain english? I understand the numerical and the random aspect but how is it a function of events?
 July 25th, 2017, 01:58 PM #2 Global Moderator   Joined: May 2007 Posts: 6,400 Thanks: 546 https://en.wikipedia.org/wiki/Random_variable Above gives a much more extensive discussion. It is not easy to answer your question in a short summary, particularly since the book definition is incomplete. Thanks from 123qwerty and dthiaw

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