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X
is an example of what is called a random variable. A random variable
is a function from Ω to the real numbers. It is a discrete random variable if
there are only countably many values
x
i
such that
P
(
X
=
x
i
)
6
= 0.
If we toss a coin 6 times, the number of heads is a random variable, 3
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Unformatted text preview: times the number of heads minus the number of tails is a random variable, etc. If we play roulette, the number that shows up is a random variable, letting X equal 1 if red shows and 0 otherwise, etc. are random variables. 5...
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This note was uploaded on 12/29/2011 for the course MATH 316 taught by Professor Ansan during the Spring '10 term at SUNY Stony Brook.
 Spring '10
 ansan
 Real Numbers

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