Search Results for dependent and independent variables

dependent and independent variables videos

	Watch Video on Independent & Dependent Variables - Math Help Access full lesson containing this video at: http://www.yourteacher.com/algebra1/independentvariable.php Students learn that in a dependency relationship, one variable depends on the other variable. For example, the amount of snow on the ground depends on the amount of snow that has fallen. The independent variable is the amount of snow that has fallen, and the dependent variable is the amount of snow on the ground. Students learn that in a correlational relationship, however, there is a connection between the variables, but one variable does not depend on the other. For example, the amount of TV that a person watches and the amount of soda that a person drinks is a correlational relationship.
	variables How psychology uses independent and dependent variables
	Curvefitting with SigmaPlot The SigmaPlot curve fitter works by varying the parameters (coefficients) of an equation, finding the parameters which cause the equation to most closely fit your data. Both the equation and the initial parameter values must be provided. All built-in equations have the curve equation and the initial parameters predefined. The curve fitter accepts up to 25 equation parameters and ten independent equation variables. You can also specify up to 25 parameter constraints, which limit the search area of the curve fitter when checking for parameter values. The regression curve fitter can also use weighted least squares for greater accuracy. Curve-fitting Algorithm The SigmaPlot curve fitter uses the Marquardt-Levenberg algorithm to find the coefficients (parameters) of the independent variable(s) that give the best fit between the equation and the data. This algorithm seeks the values of the parameters that minimize the sum of the squared differences between the values of the observed and predicted values of the dependent variable SS= n ∑ i=1 wi(yi−y2)2 where yi is the observed and yi is the predicted value of the dependent variable. This process is iterative—the curve fitter begins with a guess at the parameters, checks to see how well the equation fits, then continues to make better guesses until the differences between the residual sum of squares no longer decreases significantly. This condition is known as convergence
	History, Politics, Socioeconomics and Stratification A quantitative analysis of democracy as the independent variable and history, politics, socioeconomics, and stratification as dependent variables.
	Watch Video on Function Word Problems - Algebra Help Access full lesson containing this video at: http://www.yourteacher.com/algebra1/applicationsoffunctions.php Students are given word problems that involve functions, and are asked to identify the independent and dependent variables, as well as answer various questions related to the given function. Students are also asked if given graphs and data sets represent functions.