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  2. Instrumental variables estimation - Wikipedia

    en.wikipedia.org/wiki/Instrumental_variables...

    This works because IV solves for the unique parameter that satisfies =, and therefore hones in on the true underlying parameter as the sample size grows. Now an extension: suppose that there are more instruments than there are covariates in the equation of interest, so that Z is a T × M matrix with M > K .

  3. 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]

  4. Analysis of covariance - Wikipedia

    en.wikipedia.org/wiki/Analysis_of_covariance

    Analysis of covariance (ANCOVA) is a general linear model that blends ANOVA and regression. ANCOVA evaluates whether the means of a dependent variable (DV) are equal across levels of one or more categorical independent variables (IV) and across one or more continuous variables.

  5. Moderation (statistics) - Wikipedia

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

    An example of conceptual moderation model with one categorical and one continuous independent variable. Cohen et al. (2003) recommended using the following to probe the simple effect of gender on the dependent variable ( Y ) at three levels of the continuous independent variable: high (one standard deviation above the mean), moderate (at the ...

  6. Multivariate analysis of variance - Wikipedia

    en.wikipedia.org/wiki/Multivariate_analysis_of...

    The image above depicts a visual comparison between multivariate analysis of variance (MANOVA) and univariate analysis of variance (ANOVA). In MANOVA, researchers are examining the group differences of a singular independent variable across multiple outcome variables, whereas in an ANOVA, researchers are examining the group differences of sometimes multiple independent variables on a singular ...

  7. Separation of variables - Wikipedia

    en.wikipedia.org/wiki/Separation_of_variables

    or equivalently, = ()because of the substitution rule for integrals.. If one can evaluate the two integrals, one can find a solution to the differential equation. Observe that this process effectively allows us to treat the derivative as a fraction which can be separated.

  8. Initialization vector - Wikipedia

    en.wikipedia.org/wiki/Initialization_vector

    C Alice = E(IV 1 xor P Alice) = E(IV 2 xor (IV 2 xor IV 1 xor P Alice)). [6] Depending on whether the IV for a cryptographic scheme must be random or only unique the scheme is either called randomized or stateful. While randomized schemes always require the IV chosen by a sender to be forwarded to receivers, stateful schemes allow sender and ...

  9. Clearance (pharmacology) - Wikipedia

    en.wikipedia.org/wiki/Clearance_(pharmacology)

    For substances that exhibit substantial plasma protein binding, clearance is generally dependent on the total concentration (free + protein-bound) and not the free concentration. [ 9 ] Most plasma substances have primarily their free concentrations regulated, which thus remains the same, so extensive protein binding increases total plasma ...