Before classifying the data as qualitative or quantitative, let's recall the definitions of these classifications.
Types of Data
Description
Can It Be Measured?
Quantitative
Has units and can be measured and numerically compared.
Qualitative
Describes a category and cannot be measured or numerically compared.
Let's now consider our data set.
ZIP codes
A ZIP code is not a numerical quantity, but a category. It cannot be measured and numerically compared to other numbers. Therefore, the data is qualitative.
