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Q7

Probability and Statistics

#0000090672

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For a discrete random variable X with probability mass function P(X), what is the expected value of X?

E (X) = \sum all x_{i} x_{k} P (X)

E (X) = \sum all x_{k} x k 2 P (X)

E (X) = \sum all x_{k} P (X)

E (X) = \sum all x_{k} (x_{k} - x ¯) P (X)