Regression

# Regression - REGRESSION REGRESSION Dr. Myril Hillman...

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REGRESSION REGRESSION Dr. Myril Hillman

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BIVARIATE LINEAR BIVARIATE LINEAR REGRESSION* REGRESSION* Technique for measuring the linear association between a dependent and an independent variable *(EXCEL Chapter 11)
Bivariate Linear Bivariate Linear Regression:Two-Variable Regression:Two-Variable Regression Regression One predictor variable, X, predicts second variable, Y, the “criterion variable” Example Prediction of first semester freshmen GPA by their ACT scores

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Observation: use of scatterplot Observation: use of scatterplot will show if relationship will show if relationship appears linear appears linear
Interpretation Interpretation Multiple R: for two variables, the correlation between the predictor variable and the criterion variable. Expresses the linear relationship In the example, between ACT and GPA

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Interpretation Interpretation R Square (coefficient of determination) -represents the proportion of variation in Y explained by its linear relation with X -with only one predictor variable R square could represented by r square ( correlation coefficient)
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## This note was uploaded on 04/25/2011 for the course MKT 202 taught by Professor Hillman during the Spring '10 term at DePaul.

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Regression - REGRESSION REGRESSION Dr. Myril Hillman...

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