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Are categorical "variables" the same as "groups"? Or are groups a sub-category of variables?

Are categorical "variables" the same as "groups"? Or are groups a sub-category of variables?

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Answer #1

No, Categorical variables are not same as groups. We may say that the groups are sub category of the variables.

Categorical variables represent types of data which may be divided into groups. Examples of categorical variables are country, race, sex, age group, and educational level. While the latter two variables may also be considered in a numerical manner by using exact values for age and highest grade completed, it is often more informative to categorize such variables into a relatively small number of groups.

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