In an experiment,both the independent variable and the moderator variable often are categorical (nominal or ordinal).

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Both independent and moderator variables can be categorical (nominal or ordinal). For example, in a study on the effects of exercise on weight loss, the independent variable (exercise) may consist of categories such as no exercise, moderate exercise, and intense exercise, while the moderator variable (gender) may consist of categories such as male and female.

In an Experiment,both the Independent Variable and the Moderator Variable