Random Variable X - A variable that represents the values obtained when we take a measurement from an experiment in the real world

Discrete Random Variable - A variable that changes by steps, and takes only specified values in a given interval

Probability Function - A function that describes how the probabilites are assigned

Probability Distribution - The set of all values of a random variable together with there assigned probabilities

Expected Value of X = E(X) = mean

Varience of X = Var(x) = Variance

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