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Topics referred to by the same term
up dummy variable or dummy variables in Wiktionary, the free dictionary. The term dummy variable can refer to either of the following: Bound variable, in
Dummy_variable
Numeric stand-ins in regression analysis
In regression analysis, a dummy variable (also known as indicator variable or just dummy) is one that takes a binary value (0 or 1) to indicate the absence
Dummy_variable_(statistics)
Types of numerical variables in mathematics
equation. A variable of this type is called a dummy variable. If the dependent variable is a dummy variable, then logistic regression or probit regression
Continuous or discrete variable
Continuous_or_discrete_variable
Variable capable of taking on a limited number of possible values
polytomous variables as if they were binary variables. Regression analysis often treats category membership with one or more quantitative dummy variables. Examples
Categorical_variable
Topics referred to by the same term
up dummy in Wiktionary, the free dictionary. Dummy may refer to: Mannequin, a model of the human body Dummy (ventriloquism) Crash test dummy Dummy (nickname)
Dummy
Concept in mathematical modeling, statistical modeling and experimental sciences
A variable is considered dependent if it depends on (or is hypothesized to depend on) an independent variable. Dependent variables are the outcome of the
Dependent and independent variables
Dependent_and_independent_variables
Two propositions or events that cannot both be true
regression analysis, an independent variable that can take on only two possible values is called a dummy variable. For example, it may take on the value
Mutual_exclusivity
Concept in mathematics or computer science
the domain is the complex numbers. The term "dummy variable" is also sometimes used for a bound variable (more commonly in general mathematics than in
Free variables and bound variables
Free_variables_and_bound_variables
Statistical test of variance
beginning of the term to test entering knowledge of the material. PSI- a dummy variable indicating the teaching method used (1 = used Psi, 0 = other method)
Omnibus_test
Linear dependency situation in a regression model
it is incorrect to include all 3 variables in a regression simultaneously. Similarly, including a dummy variable for every category (e.g., summer, autumn
Multicollinearity
Price index using hedonic regression
Direct method could be divided into the Time Dummy Variable and Characteristic methods. The Time Dummy Variable is simpler, because it assumes implicit prices
Hedonic_index
Bit-vector representation where only one bit can be set at a time
are '1' except one '0' is sometimes called one-cold. In statistics, dummy variables represent a similar technique for representing categorical data. One-hot
One-hot
Addition of several numbers or other values
∑i=mnai=am+am+1+am+2+⋯+an−1+an where i is the "index of summation" or "dummy variable", ai is an indexed variable representing each term of the sum; m is the "lower bound
Summation
Mathematical function characterizing set membership
of a dummy variable. (This must not be confused with "dummy variables" as that term is usually used in mathematics, also called a bound variable.) The
Indicator_function
Statistical technique to use observational data for causal analysis
group), and I ( … ) {\displaystyle I(\dots )} is short-hand for the dummy variable equal to 1 when the event described in ( … ) {\displaystyle (\dots )}
Difference_in_differences
Difference between revenues and spending
stating the higher the quality, the lower are expected deficits. Dummy variables are variables used mainly in Econometrics and Statistics to categorize data
Government_budget_balance
Statistical model
to the within transformation exist with variations: One is to add a dummy variable for each individual i > 1 {\displaystyle i>1} (omitting the first individual
Fixed_effects_model
Type of constraints for mechanical systems
note: realize that the test equation failed because the dummy variable, and hence the dummy differential included in the test, will differentiate anything
Holonomic_constraints
Dummy used in vehicle crash testing
A crash test dummy, or simply dummy, is a full-scale anthropomorphic test device (ATD) that simulates the dimensions, weight proportions and articulation
Crash_test_dummy
Mathematical test proposed by Gregory Chow
_{i}x_{it}D_{t}+\varepsilon _{t}.\,} Which is run over i={1,...,n}. D is a dummy variable taking a value of 1 for i={ n 1 {\displaystyle n_{1}} +1,...,n} and
Chow_test
Linear function of explanatory variables used to predict a dependent variable
four-way discrete variable of blood type with the possible values "A, B, AB, O" would be converted to separate two-way dummy variables, "is-A, is-B, is-AB
Linear_predictor_function
Theorem related to ordinary least squares
explanatory variables are linearly dependent. One scenario in which this will occur is called "dummy variable trap," when a base dummy variable is not omitted
Gauss–Markov_theorem
Partition into two separate parts
"tall" vs "short", when measuring height). A variable measured dichotomously is called a dummy variable. In computer science, more specifically in programming-language
Dichotomy
Properties not expressed numerically
A variable which codes for the presence or absence of such a property is called a binary categorical variable, or equivalently a dummy variable. Some
Qualitative_property
Measure of similarity and diversity between sets
measure of similarity. For example, vectors of demographic variables stored in dummy variables, such as gender, would be better compared with the SMC than
Jaccard_index
Concept in statistics
is dummy variable assignment, a method earlier introduced. For example, if a nominal variable has three categories (A, B, and C), two dummy variables would
Nominal_category
Statistical method
or t {\displaystyle t} making the fixed effects model analogous to a dummy variable model in one dimension. In a random effects model, ε i t {\displaystyle
Panel_analysis
Variations in data at specific regular intervals less than a year
dependent variable being influenced by one or more independent variables, the seasonality can be accounted for and measured by including n-1 dummy variables, one
Seasonality
Act of determining or expressing a quantity
regression, the presence or absence of a trait is quantified by employing a dummy variable, which takes on the value 1 in the presence of the trait or the value
Quantification_(science)
Statistics concept
level of the other independent variable. For example, suppose that both A and B are single dummy coded (0,1) variables, and that A represents ethnicity
Moderation_(statistics)
Intersection of a sphere and cone emanating from its center
integrand can be separated into a product of functions each with one dummy variable. The area can be similarly calculated by integrating the differential
Spherical_sector
Variable used for specification
different values of t, we then consider t to be a variable. The quantity x is a dummy variable or variable of integration (confusingly, also sometimes called
Parameter
Integral expressing the amount of overlap of one function as it is shifted over another
cross-correlation: for real-valued functions, of a continuous or discrete variable, convolution f∗g differs from cross-correlation f⋆g only in that either
Convolution
Typographic symbol (underline)
used as a dummy variable, when its value is not important but the syntax requires it. In C#, it is used for discards, placeholder variables that are required
Underscore
Data used as a placeholder or for testing purposes
real data. For testing, dummy data can also be used as stubs or pad to avoid software testing issues by ensuring that all variables and data fields are occupied
Dummy_data
Causal or moderating relationship between statistical variables
1} dummy variables in any combination. Interactions involving a dummy variable multiplied by a measurement variable are termed slope dummy variables, because
Interaction_(statistics)
retrieved 2021-06-03 "Alternative Coding Schemes for Dummy Variables", Regression with Dummy Variables, Newbury Park, CA: SAGE Publications, Inc., 1993,
Data_analysis
Statistical modeling method
some of the regressors may not allow for marginal changes (such as dummy variables, or the intercept term), while others cannot be held fixed (recall
Linear_regression
Optimization algorithm for artificial neural networks
0.2), and target output is a specific class, encoded by the one-hot/dummy variable (e.g., (0,1,0)). C: loss function or "cost function" For classification
Backpropagation
Similarity measure
measure of similarity. For example, vectors of demographic variables stored in dummy variables, such as binary gender, would be better compared with the
Simple_matching_coefficient
Statistical mechanics framework
implicitly in terms of the distribution function and boundary conditions, a dummy variable ε {\displaystyle \varepsilon } is introduced to keep track of the appropriate
Chapman–Enskog_theory
Mathematical descriptions of molecular diffusion
reaction model of the adsorption), and τ {\displaystyle \tau } is a dummy variable. Monte Carlo simulations show that these two equations work to predict
Fick's_laws_of_diffusion
Integral transform useful in probability theory, physics, and engineering
{\displaystyle F(s)={\mathcal {L}}\{f(t)\}} , with the understanding that the dummy variable t {\displaystyle t} does not appear in the function F ( s ) {\displaystyle
Laplace_transform
Computational Formula that can be measured in terms of True or False
x_{3},\dots ,x_{n})} where every variable falls within the scope of some quantifier. By introducing dummy variables, any formula in prenex normal form
True quantified Boolean formula
True_quantified_Boolean_formula
Partial differential equation
t'}(y\mid x'),} which is the Chapman–Kolmogorov theorem. Changing the dummy variable y {\displaystyle y} to x {\displaystyle x} , one gets ∫ p ( x ) lim
Fokker–Planck_equation
Process of replacing missing data with substituted values
on x {\displaystyle x} in non-imputed data, z {\displaystyle z} is a dummy variable for class membership, and data are split into respondent ( r {\displaystyle
Imputation_(statistics)
Statistical model for a binary dependent variable
variables. (Discrete variables referring to more than two possible choices are typically coded using dummy variables (or indicator variables), that is, separate
Logistic_regression
Statistical model
\,} where S e x i j {\displaystyle \mathrm {Sex} _{ij}} is a binary dummy variable and P a r e n t s E d u c i j {\displaystyle \mathrm {ParentsEduc} _{ij}}
Random_effects_model
Model describing the departures from ideality in solutions of electrolytes and plasmas
\prod } is a notation for multiplication, i {\displaystyle i} is a dummy variable indicating the species, s {\displaystyle s} is the number of species
Debye–Hückel_theory
Mathematical use of "for all" and "there exists"
the middle of P(x). Formally, however, the phrase that introduces the dummy variable is placed in front. Mathematical formulas mix symbolic expressions for
Quantifier_(logic)
NP-hard problem in combinatorial optimization
j {\displaystyle x_{ij}} variables as above, there is for each i = 1 , … , n {\displaystyle i=1,\ldots ,n} a dummy variable u i {\displaystyle u_{i}}
Travelling_salesman_problem
Machine learning algorithm
trees can handle qualitative predictors, there is no need to create dummy variables. Uses a white box or open-box model. If a given situation is observable
Decision_tree_learning
Transcendental single-variable function
given above; simply replace θ {\displaystyle \,\theta \,} with the dummy variable x {\displaystyle x} , and integrate over the interval [ 0 , θ ] . {\displaystyle
Clausen_function
Statement relating differentiable symmetries to conserved quantities
coordinate(s) that follows the comma, e.g. φA,σ=∂φA∂xσ. Since ξ is a dummy variable of integration, and since the change in the boundary Ω is infinitesimal
Noether's_theorem
Survey-based statistical technique
Respondents then ranked or rated these profiles. Using relatively simple dummy variable regression analysis the implicit utilities for the levels could be calculated
Conjoint_analysis
Formal fallacy in statistical interpretation
the omitted variable bias for the regression of Y on X where the regressor X {\displaystyle X} is a dummy variable and the omitted variable Z {\displaystyle
Ecological_fallacy
Financial agreement
hedonic regression, accounting for unmeasured qualities by adding dummy variables that represent elements of the index, indicating the unique quality
Perpetual_futures
Parameter in physics problems
For a differential mass element of the spring dm at a position s (dummy variable) moving with a speed u(s), its kinetic energy is: dK=12dmu2 In order
Effective mass (spring–mass system)
Effective_mass_(spring–mass_system)
Form of discrimination
more than a dummy variable since gender is fundamental to the economy. Moreover, the segmentation in the labor market, institutional variables and non-market
Employment_discrimination
Mathematical description in crystallography
{2k}{3}}+{\tfrac {\ell }{2}}\right)}\right]} From this it is convenient to define dummy variable X ≡ h / 3 + 2 k / 3 + ℓ / 2 {\displaystyle X\equiv h/3+2k/3+\ell /2}
Structure_factor
Correlation of a signal with a time-shifted copy of itself, as a function of shift
. Note that the parameter t {\displaystyle t} in the integral is a dummy variable and is only necessary to calculate the integral. It has no specific
Autocorrelation
Statistical method for handling missing data
researcher is hoping to model income (dependent variable) based on age and gender (independent variables). Using listwise deletion, the researcher would
Listwise_deletion
Statistical technique
matter whether dummy variables for all but one of the seasons are introduced into the regression equation, or if the independent variable is first seasonally
Seasonal_adjustment
Pronoun having no referent
A dummy pronoun, also known as an expletive pronoun, is a pronoun that does not refer to anything, and exists only to satisfy a syntactic requirement
Dummy_pronoun
wave equation, the magnitude of the wave vector k an integer, e.g. a dummy variable in summations, or an index of a matrix an unspecified (real) constant
Latin letters used in mathematics, science, and engineering
Latin_letters_used_in_mathematics,_science,_and_engineering
Interpreter that enables users to enter and run programs in the BASIC language
displacement to the dummy variable parameter in function definition). In Atari BASIC, a set of pointers (addresses) indicated various data: variable names were
BASIC_interpreter
Concept in statistics
where A {\displaystyle \mathbf {A} } is a large sparse matrix of the dummy variables for the fixed effect terms. One can use this partition to compute the
Projection_matrix
Differential equation containing derivatives with respect to only one variable
λ {\displaystyle \lambda } and ε {\displaystyle \varepsilon } are dummy variables of integration (the continuum analogues of indices in summation), and
Ordinary differential equation
Ordinary_differential_equation
stochastic model Drift rate – redirects to Stochastic drift Dudley's theorem Dummy variable (statistics) Duncan's new multiple range test Dunn index Dunnett's test
List_of_statistics_articles
Placeholder term used in computer science
A metasyntactic variable is a specific word or set of words identified as a placeholder in computer science and specifically computer programming. These
Metasyntactic_variable
Equations describing classical electromagnetism
can lead to ever-increasing violations of those laws. By introducing dummy variables characterizing these violations, the four equations become not overdetermined
Maxwell's_equations
Measure of how different one language is from another
linguistic distance that is a continuous scalar rather than a discrete dummy variable ... William Hernandez Requejo; John L. Graham (4 March 2008), Global
Linguistic_distance
exactly once in some corpus. In programming, a singleton variable, occurring only once, might be a dummy argument or a mistake that can be detected by a linter
Glossary_of_computer_science
Relative importance of certain frequencies in a composite signal
has been made of z {\displaystyle z} and t {\displaystyle t} being dummy variables. So, we have F { x T ∗ ( − t ) } = ∫ − ∞ ∞ x T ∗ ( − t ) e − i 2 π
Spectral_density
Minimum price a seller is willing to accept for one unit of their product
individual's utility function, where w is the person's wealth and x is a dummy variable that takes the value 1 in the presence of an undesired feature and takes
Willingness_to_accept
Branch of economics
characteristic of the item and Y i , t {\displaystyle Y_{i,t}} is a time dummy variable controlling for exogenous factors affecting the pricing of artworks
Economics of the arts and literature
Economics_of_the_arts_and_literature
Morocco and Tunisia Compared, UNECA, 2008), when drought, measured as a dummy variable computed on the basis of the rate of growth of cereal yield, endangers
Economy_of_Morocco
Bilateral trade flow model
Bergstrand (2009)), or exporter-country-year and importer-country-year dummy variables. For counterfactual analysis, however, one would still need to account
Gravity_model_of_trade
2001 (in Chinese) Figart, Deborah M. (1997). "Gender as more than a Dummy Variable—Feminist Approaches to Discrimination". Review of Social Economy. 55
Gender_inequality_in_China
Type of statistical model
effects in a model are allowed to vary, and when testing a dummy-coded categorical variable as a single effect. However, the test can only be used when
Multilevel_model
Dialect of Microsoft BASIC programming language
the function itself; the function is always shown being assigned to "dummy" variables, which, without action to set a value by user-code, just receive a
Applesoft_BASIC
American economist
well as world economic growth over the crisis period. They included a dummy variable to account for any IMF-supported programs in the country at the time
Enrica_Detragiache
analysis. Systematic errors such as seen in the picture are quantified by dummy variables. Further details and examples are available in an online tutorial by
Calculation of glass properties
Calculation_of_glass_properties
Procedural, imperative computer programming language
similar to Algol 60. Arguments are passed using call by reference, using dummy variables for values where needed (call by value). A wide range of computational
PL/I
Data analysis technique
variables.[citation needed] An indicator matrix is an individuals × variables matrix, where the rows represent individuals and the columns are dummy variables
Multiple correspondence analysis
Multiple_correspondence_analysis
resources A and B are the same as in the previous example – not simply dummy variables, as otherwise the programs are identical. As before, if there are several
Software_incompatibility
criticized by Paul Rubin and Hashem Dezhbakhsh for inappropriately using a dummy variable; Rubin and Dezhbakhsh reported in a 2003 study that right-to-carry laws
Gun violence in the United States
Gun_violence_in_the_United_States
Choice between two or more discrete alternatives
provides the highest utility. The choice of the person is designated by dummy variables, yni, for each alternative: y n i = { 1 U n i > U n j ∀ j ≠ i 0 otherwise
Discrete_choice
Bayesian approach to multivariate linear regression
consists of k−1 explanatory variables, grouped into a vector x i {\displaystyle \mathbf {x} _{i}} of length k (where a dummy variable with a value of 1 has
Bayesian multivariate linear regression
Bayesian_multivariate_linear_regression
Lattice in universal algebra
closed class, which is an iterative system closed under introduction of dummy variables. There are four closed classes that are not clones: the empty set,
Post's_lattice
Dual-velocity wave phenomenon
t'}}\cos k\right]e^{-ik}dk,} where k {\displaystyle k} is simply a dummy variable, and, finally f ( ξ , t ′ ) = 2 π τ t ′ ξ J 1 ( 2 ξ t ′ ) , {\displaystyle
Precursor_(physics)
Branch of statistics
categorical predictor variables, which are encoded as {0,1} indicator or dummy variables. The log-rank test is a special case of a Cox PH analysis, and can
Survival_analysis
Response of an electrical circuit with initial state of zero
t_{o}\,} for a {\displaystyle a\,} and by using the dummy variable τ {\displaystyle \tau \,} as the variable of integration the general equation v ( t ) = v
Zero_state_response
Application of quantitative research techniques to the field of marketing
numbers, consistency checks, substitutions, deletions, weighting, dummy variables, scale transformations, scale standardization Statistical analysis
Quantitative marketing research
Quantitative_marketing_research
Canadian professor of economics
explaining the growth of deposit banking, however, the significance of a dummy variable for 1902 points to other time-correlated factors such as innovations
Angela_Redish
Concept in computing
of error and using the fact that i ′ {\displaystyle i'\,} is just a dummy variable in the sum gives the following as an upper bound on the probability
Error_exponent
Regression analysis technique
independent variables (also known as "features") describing person n, which may be either discrete "dummy variables" or regular continuous variables. ε n {\displaystyle
Binomial_regression
Computational problem
Note that any expression can be converted to this form by adding dummy variables that do not appear in ψ. By constructing a graph G like the one shown
Generalized_geography
Set of rules defining correctly structured programs
language, variables could be declared with var for function scoped variables, and let or const which are for block level variables. Before ES6, variables could
JavaScript_syntax
Design of experiments in statistics
random coefficient setting for the different treatment options, or use dummy variables for the different possible treatments. For instance, when thinking
Multiple_treatments
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