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# PMF - p X x = 0.3164 if x = 0.4219 if x = 1 0.2109 if x = 2...

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Learning Objectives Define probability mass function Set up and use probability mass functions for  discrete events

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PMF probability mass function  (PMF) gives the  probability of each numerical value that the  random variable can take p X ( x ) = P ( X = x ) “x” is a possible value of the RV named “X” PMF of RV named “X” RV named “X”
Example X: the number of A’s in a 4 bp DNA sequence

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Unformatted text preview: p X ( x ) = 0.3164, if x = 0.4219, if x = 1 0.2109, if x = 2 0.0469, if x = 3 0.0039, if x = 4 -1 1 2 3 4 5 6 0.1 0.2 0.3 0.4 0.5 x (number of A) p(x) PMF Properties • The total probability is equal to 1 • For any set S of possible values of X, Exercises • Exercise #1 • Exercise #2 • Exercise #3...
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