+A **stochastic process** is a mathematical model describing a collection of [random variables](/wiki/random_variable) indexed by time. It captures the evolution of a system whose state changes unpredictably, often modeling phenomena like stock fluctuations or [population growth](/wiki/population_growth).
+## See also
+- [Probability](/wiki/probability)
+- [Statistics](/wiki/statistics)
+- [Time Series](/wiki/time_series)
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