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Topic: Dependent variable

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	Searching for Structure (statistics)
		Explained variation is measured by the difference between the variation in the parent group and the sum of variation in the two children groups.
		This is the slope of the dependent variable y on the covariate z in group g.
		As predicted value for variable j, a case is assigned the proportion of cases having value 1 for this variable in the group to which the case belongs, i.e.
	www.unesco.org /webworld/idams/Doc/ManualHtml/E2search.htm (1384 words)

	Variables
		In general the independent variable is manipulated by the experimenter and its effects on the dependent variable are measured.
		In contrast, the dependent variable "memory test" is a quantitative variable since memory performance was measured on a quantitative scale (number correct).
		Variables such as number of children in a household are called "discrete variables" since the possible scores are discrete points on the scale.
	psych.rice.edu /notestat/chapter1/variables.html (612 words)

	Independent variable - Wikipedia, the free encyclopedia
		In an experimental design, the independent variable (argument of the function) is the variable that is manipulated or selected by the experimenter to determine its relationship to an observed phenomenon (the dependent variable).
		In other words, the independent variable is the “presumed cause,” while dependent variable is the “presumed effect” of the independent variable.
		In a study of how different dosages of a drug are related to the severity of symptoms of a disease, a researcher could compare the frequency and intensity of varying symptoms (the dependent variables) when varying dosages (the independent variable) are administered, and attempt to draw a conclusion.
	en.wikipedia.org /wiki/Independent_variable (420 words)

	Dependent variable - Wikipedia, the free encyclopedia
		That is, the experimenter is interested in determining if the value of the dependent variable varies when the values of another variable – the independent variable – are varied, and by how much.In simple terms, the independent variable is said to cause an apparent change in, or simply affect, the dependent variable.
		In mathematics, the dependent variable is usually represented as a function of the independent variables.
		In a study of how different dosages of a drug are related to the severity of symptoms of a disease, a measure of the severity of the symptoms of the disease is a dependent variable and the administration of the drug in specified doses is the independent variable.
	en.wikipedia.org /wiki/Dependent_variable (432 words)

	REGRESSION ANALYSIS:
		The F-statistic is a ratio of two numbers, the mean square (or average variation or variance) associated with the regression and the mean square (or average variation or variance) associated with the residuals or errors.
		It is clear that, if the independent variable(s) is/are not at all associated with or predict variation in the dependent variable, then the regression sum of square equals 0 and F equals 0 also.
		Except for the limiting case, where all correlation among the independent variables are zero, it is actually impossible to attribute variation in the dependent variable uniquely to each of the independent variables.
	www.msu.edu /~nurse/classes/summer2001/813/newregression3.htm (3544 words)

	Variable (mathematics) - MSN Encarta
		Variable (mathematics), mathematical or physical quantity that does not have a fixed numerical value.
		The dependent variable is the variable being measured, while the independent variable can be controlled by the experiment.
		The dependent variable in this case would be the distance fallen, d, and the independent variable would be the time, t, because the distance fallen depends on the elapsed time.
	encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=701509030 (262 words)

	Variable - Psychology Wiki - A Wikia wiki
		More precisely, a variable binds (associates) a name (sometimes called an identifier) with the location; a value in turn is stored as a data object in that location so that the object can be accessed later via the variable, much like referring to someone by name.
		The scope of a variable describes where in a program's text a variable may be used, while extent (or lifetime) describes when in a program's execution a variable has a value.
		By contrast, it is permissible for a variable binding to extend beyond its scope, as occurs in Lisp closures and C static variables.
	psychology.wikia.com /wiki/Variable (2034 words)

	The Web's Multiple Regression Home Page (Site not responding. Last check: 2007-11-06)
		It will find which variables are important enough to include in the model, determine the proper transformation of each of those variables, then look for 2-way and 3-way interaction terms important enough to include in the model, and transform them appropriately.
		Dependent variable scaling can be used to eliminate negative values in the dependent variable so that certain independent variable transformations are possible.
		Enter a "q" to cause all independent variables and the dependent variable to have the mean subtracted before any scaling of the data.
	www.eskimo.com /~brainy (2061 words)

	Variables, Functions and Equations
		The degree of a term or monomial is the sum of the exponents of the variables.
		Dependent variables are those which are changed by the independent variables.
		There is one dependent variable, the quantity of pizza demanded, and there are two independent variables, the price of pizza and the number of potential pizza eaters.
	www.columbia.edu /itc/sipa/math/variables.html (1153 words)

	Independent & Dependent Variables (Site not responding. Last check: 2007-11-06)
		In an experiment, the independent variable is the variable that is varied or manipulated by the researcher, and the dependent variable is the response that is measured.
		An independent variable is the presumed cause, whereas the dependent variable is the presumed effect.
		In experiments, the IV is the variable that is controlled and manipulated by the experimenter; whereas the DV is not manipulated, instead the DV is observed or measured for variation as a presumed result of the variation in the IV.
	www.uncp.edu /home/collierw/ivdv.htm (516 words)

	POWERMUTT: Control Variables
		The fact that two variables in a table are related does not necessarily mean that one is a cause of the other, even if the relationship is statistically significant and we are willing to reject the notion that the relationship is due to chance.
		To introduce a control variable into a relationship displayed in a contingency table, the original table is broken down into two or more subtables, one for each value of the control variable.
		intervening variable (that is, one that comes between the independent and dependent variables in a causal sequence).
	www.csupomona.edu /~jlkorey/POWERMUTT/Topics/control_variables.html (1527 words)

	PreLab Sketch Graph
		The dependent variable value might be zero, a constant positive value, or constant negative value.
		If you think that there is a higher order relationship (e.g., the dependent variable increases with the square of the independent variable increase) between the independent and dependent variables, then you will need to express the relationship in the graph as a curve.
		Another common type of asymptotic curve is one where the independent variable as less and less of an effect on the dependent variable.
	www.ncsu.edu /labwrite/pl/pl-sketchgraphnew.htm (684 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		It is not necessarily that all the independent or dependent variables of a problem appear explicitly.
		Here a and b are any two dependent variables (candidate functions of the independent variable that we assume are differentiable) and c is an arbitrary constant.
		Coefficients: The coefficients of an ODE (PDE) are the factors of the dependent variable and its derivatives.
	www.tam.cornell.edu /courses/310Sp97/def.htm (719 words)

	Variables - Educational Research - Del Siegle (Site not responding. Last check: 2007-11-06)
		Dependent (Outcome) Variable-That factor which is observed and measured to determine the effect of the independent variable, i.e., that factor that appears, disappears, or varies as the experimenter introduces, removes, or varies the independent variable.
		It is the consequent variable that is presumably affected by one or more independent variables that are either manipulated by the researcher or observed by the researcher and regarded as antecedent conditions that determine the value of the dependent variable.
		Gender is the moderator variable because it moderates or changes the relationship between the independent variable (teaching method) and the dependent variable (reading achievement).
	www.gifted.uconn.edu /siegle/research/Variables/variablenotes.htm (1577 words)

	Experimentation in Psychological Research Handout
		Experiments are tests of hypotheses in which investigators manipulate an independent variable in order to determine a cause and effect relationship between the independent and dependent variable.
		The variables that are measured by an investigator to determine if the independent variable had the intended effect are dependent variables.
		Dependent variables are so named because they depend on the behavior of the participant, which is hopefully affected by the independent variable.
	otel.uis.edu /yoder/exp_h.htm (896 words)

	Class 15 Worksheet
		In binary logistic regression, the analysis focuses on finding which independent variables increase the likelihood that a subject is a member a particular group specified by the dependent variable, rather than a member of the other group specified by the dependent variable.
		If we extend the example of dummy coding to a three-group independent variable, the regression coefficients represent the differences for two of the groups from the third group which acts as a reference or baseline for both of the other groups.
		Suppose for example, that the dependent variable was scores on a depression inventory and the independent variable was Marital Status coded as 1 = married, 2 = marital breakdown, and 3 = never married.
	www.utexas.edu /courses/schwab/sw388r7/ClassWorksheets/Class15.htm (1488 words)

	Definition: Dependent variable (Site not responding. Last check: 2007-11-06)
		In a research study, the variable that you believe might be influenced or modified by some treatment or exposure.
		Sometimes the dependent variable is called the outcome variable.
		In a study of prenatal care, the birthweight is an outcome or dependent variable, but in neonatology, it is more likely to be an independent variable.
	www.childrens-mercy.org /stats/definitions/dv.htm (125 words)

	Independent Variable Id Flags
		The usual relationship in a regression equation is a linear relationship in which the dependent and independent variables are used in their arithmetic form.
		There are instances in which the independent variable is related to the dependent variable in a nonlinear form.
		Whenever the dependent variable is transformed, a second equation is required to return an arithmetic value for the dependent variable.
	www.csus.edu /indiv/j/jensena/mgmt105/flag.htm (764 words)

	Multiple Classification Analysis
		In statistical terms, the MCA model specifies that a coefficient be assigned to each category of each predictor, and that each individual’s score on the dependent variable be treated as the sum of the coefficients assigned to categories characterizing that individual, plus the average for all cases, plus an error term.
		This statistic is an approximate measure of the relationship between a predictor and the dependent variable, while holding constant all other predictors, i.e., assuming that in each category of a given predictor all other predictors are distributed as they are in the population at large.
		In the case of Analysis of Variance, the problem of correlated predictors must be considered, whereas in the case of Multiple Regression or Discriminant Analysis, one is faced with the problem of predictors, which are not interval scale variables, but categories, often with scales as weak as the nominal level.
	www.unesco.org /webworld/idams/advguide/Chapt5_3.htm (1098 words)

	Fundamentals of Statistical Interactions
		This implies that for all values of the independent variable the effect on the dependent variable is constant, regardless of the value of a second independent variable.
		Critics speculate that the increase in collinearity impacts the quality of the parameter estimate of the effect of the independent variables on the dependent variable by increasing the covariance and variances of regression coefficients (Friedrich 1982).
		In this case it is once again important to remember that the inclusion is not solely important for explaining the variance in the dependent variable, but also establishing the presence of the conditional relationship between the independent variables and the dependent variables.
	www.ruf.rice.edu /~branton/interaction/faqfund.htm (1625 words)

	Independent and Dependent Variables
		An independent variable is a factor that is manipulated in an experiment.
		The dependent variable is measured to determine if the manipulation of the independent variable had any effect.
		The subjects assigned to eat carrots are in the experimental group, whereas subjects not eating carrots are in the control group.
	www.lhup.edu /sboland/independent_and_dependent_variab.htm (597 words)

	Graphing- Bar Graphs
		Since the scalar dependent variable has a natural zero point (i.e., absolute or ratio), all of the bars are anchored to the horizontal axis, giving a common point of measurement.
		For this type of graph, the dependent variable is almost always a scalar scale representing the count, or number, of how many of a sample fall within each range of the independent variable.
		A particularly powerful use for the composite bar graph is when the sum of all the dependent variable values for each bar is the same, such as when the values are a fraction of a whole.
	www.ncsu.edu /labwrite/res/gh/gh-bargraph.html (863 words)

	Independent variable Summary
		An independent variable is the variable that is acted upon by a function.
		In an experimental design, the independent variable (also called the explanatory variable) is the variable which is manipulated or selected by the experimenter to determine its relationship to an observed phenomenon (the dependent variable).
		The independent variable is also called the 'predictor variable', 'exposure variable', 'explanatory variable', or 'x-variable'.
	www.bookrags.com /Independent_variable (611 words)

	The Makefile System: Key Variables
		The CPP variable is a recursive-substitution variable that specifies the shell command to invoke the C compiler.
		The CPP variable is a recursive-substitution variable that specifies the shell command to invoke the C++ compiler.
		The TouchIdls variable is a recursive-substitution variable that provides a text that may be used as a shell command to touch all the IDL source code files identified by a project, thereby making them newer that their corresponding C++ implementation files and causing their re-compilation.
	www.grc.nasa.gov /WWW/price000/mak/htm/mak_variables.html (4878 words)

	Polynomial Regression
		This means that the rate of change in the dependent variable produced by changes in independent variable does not vary with the values of the independent variable.
		A nonlinear relationship refers to a relationship between the dependent variable and an independent variable in which the effect of the independent variable on the dependent variable varies according to the value of that independent variable.
		The use of a logarithm is warranted when the effect of the independent variable on the dependent variable varies, specifically when for example the effect of the independent variable is stronger at low values of X than at high values.
	www.ruf.rice.edu /~branton/interaction/faqpoly.htm (1926 words)

	[No title]
		In this type of icon plot, a separate polygon icon is plotted for each case; relative values of the selected variables for each case are represented by the distance from the center of the icon to consecutive corners of the polygon (clockwise, starting at 12:00).
		The terms dependent and independent variable apply mostly to experimental research where some variables are manipulated, and in this sense they are "independent" from the initial reaction patterns, features, intentions, etc. of the subjects.
		The value of the population intraclass correlation coefficient is a measure of the homogeneity of observations within the classes of a random factor relative to the variability of such observations between classes.
	www.statsoft.com /textbook/glosi.html (3481 words)

	Dependant and independant variables defined by know-it-all expert Dr. Galapagos.
		The dependent variable is therefore m and the independant variable is e.
		In an algebra equation the variable you are solving for is the dependent variable.
		As far as most algebra equations are concerned, any number can be put into an independent variable (not always true, of course, in the real world) but the dependent variable can only be known after a value is given for the independent variable(s).
	www.ftexploring.com /askdrg/askdrgalapagos5.html (1484 words)

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