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  2. Free variables and bound variables - Wikipedia

    en.wikipedia.org/wiki/Free_variables_and_bound...

    In mathematics, and in other disciplines involving formal languages, including mathematical logic and computer science, a variable may be said to be either free or bound.. Some older books use the terms real variable and apparent variable for free variable and bound variable, respective

  3. Exogenous and endogenous variables - Wikipedia

    en.wikipedia.org/wiki/Exogenous_and_endogenous...

    An economic variable can be exogenous in some models and endogenous in others. In particular this can happen when one model also serves as a component of a broader model.

  4. 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]

  5. Mediation (statistics) - Wikipedia

    en.wikipedia.org/wiki/Mediation_(statistics)

    Simple mediation model. The independent variable causes the mediator variable; the mediator variable causes the dependent variable. In statistics, a mediation model seeks to identify and explain the mechanism or process that underlies an observed relationship between an independent variable and a dependent variable via the inclusion of a third hypothetical variable, known as a mediator ...

  6. Regression analysis - Wikipedia

    en.wikipedia.org/wiki/Regression_analysis

    In the more general multiple regression model, there are independent variables: = + + + +, where is the -th observation on the -th independent variable.If the first independent variable takes the value 1 for all , =, then is called the regression intercept.

  7. Calculus - Wikipedia

    en.wikipedia.org/wiki/Calculus

    In mathematics education, calculus is an abbreviation of both infinitesimal calculus and integral calculus, which denotes courses of elementary mathematical analysis.. In Latin, the word calculus means “small pebble”, (the diminutive of calx, meaning "stone"), a meaning which still persists in medicine.

  8. Dan Doornink - Wikipedia

    en.wikipedia.org/wiki/Dan_Doornink

    Daniel Glenn Doornink (born February 1, 1956) is an American former professional football running back in the National Football League (NFL) who played one season for the New York Giants and seven seasons for the Seattle Seahawks.

  9. Family of Joe Biden - Wikipedia

    en.wikipedia.org/wiki/Family_of_Joe_Biden

    The family of Joe Biden, the 46th president of the United States, includes members prominent in law, education, activism and politics. Biden's immediate family was the first family of the United States from 2021 to 2025.