+**1df** (one degree of freedom) describes a system whose state can be fully determined by a single independent parameter. This concept is fundamental in [Physics](/wiki/physics) for analyzing motion and in [Statistics](/wiki/statistics) for evaluating model fit. It simplifies the understanding of complex systems by reducing their variables.
+## See also
+- [Degrees of Freedom](/wiki/degrees-of-freedom)
+- [Kinematics](/wiki/kinematics)
+- [Hypothesis Testing](/wiki/hypothesis-testing)
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