Nominal Scale

These are used for identification, naming or to provide names
Nominal data comes from counting things and putting them in a category.
These categories are based on names and there is no order to these names.

telephone numbers, account numbers, "20".

When measuring using a nominal scale you use categories and there is no concept of ordering
This only represents equivalence / names of categories

This data does not have any numerical values.
This data can only be separated into categories.
(examples: colours or favourite types of food)