discrete random variable
statistics
Quick Summary
In statistics, a discrete random variable is a variable that can only take on a finite number of values, each with a specific probability. These probabilities must sum to 1. For example, the number of heads when tossing three coins is a discrete random variable. The probability distribution for such a variable is defined by a probability mass function, which assigns a probability to each possible outcome. This function must be nonnegative for all values, and the sum of all probabilities must equal one.12
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