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Random Variables and Discrete Probability Distributions

Random Variables and Discrete Probability Distributions

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Does the table below represent a<br />

probability distribution for a<br />

discrete r<strong>and</strong>om variable?<br />

x P(X = x)<br />

-2 0.25<br />

1 0.3<br />

3 0.4<br />

5 0.05<br />

YES! The values in<br />

the P(X = x) column<br />

are each between<br />

zero <strong>and</strong> one,<br />

inclusive <strong>and</strong> the sum<br />

of these values is<br />

one.

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