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  2. Dependent and independent variables - Wikipedia

    en.wikipedia.org/wiki/Dependent_and_independent...

    In mathematics, a function is a rule for taking an input (in the simplest case, a number or set of numbers) [5] and providing an output (which may also be a number). [5] A symbol that stands for an arbitrary input is called an independent variable, while a symbol that stands for an arbitrary output is called a dependent variable. [6]

  3. Variable (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Variable_(mathematics)

    The property of a variable to be dependent or independent depends often of the point of view and is not intrinsic. For example, in the notation f(x, y, z), the three variables may be all independent and the notation represents a function of three variables. On the other hand, if y and z depend on x (are dependent variables) then the notation ...

  4. Dependency - Wikipedia

    en.wikipedia.org/wiki/Dependency

    Dependency relation, a type of binary relation in mathematics and computer science. Dependent and independent variables, in mathematics, the variable that depends on the independent variable; The absence of independence (probability theory) Tail dependence, from probability theory; Serial dependence, in statistics; Correlation and dependence ...

  5. Continuous or discrete variable - Wikipedia

    en.wikipedia.org/.../Continuous_or_discrete_variable

    A variable of this type is called a dummy variable. If the dependent variable is a dummy variable, then logistic regression or probit regression is commonly employed. In the case of regression analysis, a dummy variable can be used to represent subgroups of the sample in a study (e.g. the value 0 corresponding to a constituent of the control ...

  6. Discrete calculus - Wikipedia

    en.wikipedia.org/wiki/Discrete_calculus

    Discrete differential calculus is the study of the definition, properties, and applications of the difference quotient of a function. The process of finding the difference quotient is called differentiation. Given a function defined at several points of the real line, the difference quotient at that point is a way of encoding the small-scale (i ...

  7. Limited dependent variable - Wikipedia

    en.wikipedia.org/wiki/Limited_dependent_variable

    A limited dependent variable is a variable whose range of possible values is "restricted in some important way." [ 1 ] In econometrics , the term is often used when estimation of the relationship between the limited dependent variable of interest and other variables requires methods that take this restriction into account.

  8. Weakly dependent random variables - Wikipedia

    en.wikipedia.org/wiki/Weakly_dependent_random...

    In probability, weak dependence of random variables is a generalization of independence that is weaker than the concept of a martingale [citation needed]. A (time) sequence of random variables is weakly dependent if distinct portions of the sequence have a covariance that asymptotically decreases to 0 as the blocks are further separated in time.

  9. Regression analysis - Wikipedia

    en.wikipedia.org/wiki/Regression_analysis

    The response variable may be non-continuous ("limited" to lie on some subset of the real line). For binary (zero or one) variables, if analysis proceeds with least-squares linear regression, the model is called the linear probability model. Nonlinear models for binary dependent variables include the probit and logit model.