Nominal+variable

Categories only Can be numbered but the assigned numbers are meaningless in the sense that we cannot do math on them; the numbers are simply labels Example: Gender: 1=male 2=female

Can swap the numbers any way one wants and it would not matter Example: 1 is not “less gender” than 2

Only mathematical operation possible is counting and comparing numbers in categories Examples: Race, Zipcode, Religion, Region of country

Distinguish between variables with only two, and with more than two categories