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FM Categorical Variable

2.1 Response and Explanatory Variables

Explanatory Variable

  • The explanatory variable (EV) is the variable used to explain or predict another variable (the response variable).
  • By convention, the explanatory variable is plotted along the x-axis of a graph, if it is numerical.

Response Variable

  • The response variable (RV) is the variable which is explained or predicted by the explanatory variable.
  • By convention, the response variable is plotted along the y-axis of a graph, if it is numerical.

Note: both explanatory and response variables can be either categorical or numerical variables.

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