A large city offers many venues for watching a concert. A listing of concert venues for the city includes the following information: the number of seats, the age of the venue, the number of nearby parking spaces, and the location of the venue (inside or outside). Which of the following is a categorical variable?

A categorical variable sorts observations into groups rather than measuring or counting an amount. Location divides venues into the categories inside and outside, so it is categorical. The number of seats, age, and number of parking spaces are numerical variables.

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