The examples in this page will use dataset called Īnd we will focus on the categorical variable race, which has four levels (1 = General types of coding and when to use them: Level, in which case you would want to use repeated coding. Or you may want to compare each level to the next higher In that case you would use a system called simpleĬoding. You may want to compare each level of the categorical variable to the lowest You select depends on the comparisons that you want to make. There are a variety of coding systems that can be used when recoding categorical variables, and which one Recoded into a series of variables which can then beĮntered into the regression model. ![]() Unlike dichotomous or continuous variables, they cannot by entered into the ![]() Categorical variables require special attention in regression analysis because,
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