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In probability and statistics, a random variable, random quantity, aleatory variable or stochastic variable is a quantity whose value depends in some clearly-defined way on a set of possible random events. A random variable can take on a set of possible different values (similarly to other mathematical variables), each with an associated probability. Like a traditional mathematical variable, its value is thus unknown a priori (before the outcome of the events is known). However, in a more abstract sense, it is defined as a function that maps from an outcome of the events (that is, from a point in a probability space) to a mathematically convenient outcome label, usually a real number. In this sense, it is a procedure for assigning a number to an outcome, and paradoxically this procedure it

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• Random variable
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• In probability and statistics, a random variable, random quantity, aleatory variable or stochastic variable is a quantity whose value depends in some clearly-defined way on a set of possible random events. A random variable can take on a set of possible different values (similarly to other mathematical variables), each with an associated probability. Like a traditional mathematical variable, its value is thus unknown a priori (before the outcome of the events is known). However, in a more abstract sense, it is defined as a function that maps from an outcome of the events (that is, from a point in a probability space) to a mathematically convenient outcome label, usually a real number. In this sense, it is a procedure for assigning a number to an outcome, and paradoxically this procedure it
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