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Unformatted text preview: = 0 if treatment group 1 , 2 i X = 1 if treatment group =2 and = 0 if treatment group 2, … ) 1 ( j i X = 1 if treatment group = j-1 and = 0 if treatment group j-1 These variables are referred to as dummy variables . There are j-1 dummy variables for a categorical explanatory variable with j levels. SPSS Regression>Linear procedure does not create dummy variables for categorical variables. You need to create them in your dataset. SPSS General Linear Models>Univariate procedure creates dummy variables for categorical variables you specify under Fixed Factor(s) . CR Long C532: Regression Modeling 7 Nov 2011 2 Using the SPSS procedure General Linear Model>Univariate will allow you to specify the explanatory variable as categorical by placing it under Fixed Factor(s):...
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This note was uploaded on 01/03/2012 for the course C 532 taught by Professor Long during the Fall '11 term at Palmer Chiropractic.
- Fall '11