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What does dummy mean in pom qm12/6/2023 ![]() The three dummy variables that represent this variable are shown to the right, where each variable takes a value of 0 when its category is not present, and a value of 1 when its category is present. ![]() ![]() The table below shows a categorical variable that takes on three unique values: A, B, and C. Dummy variables are also known as indicator variables, design variables, contrasts, one-hot coding, and binary basis variables. Numeric variables can also be dummy coded to explore nonlinear effects. Where a categorical variable has more than two categories, it can be represented by a set of dummy variables, with one variable for each category. ![]() A dummy variable is a variable that takes values of 0 and 1, where the values indicate the presence or absence of something (e.g., a 0 may indicate a placebo and 1 may indicate a drug).
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