Nominal variables
NOMINAL VARIABLE A nominal variable is a type of variable that is used to name, label or categorize particular attributes that are being measured. It takes qualitative values representing different categories, and there is no intrinsic ordering of these categories. You can code nominal variables with numbers, but the order is arbitrary and arithmetic operations cannot be performed on the numbers. This is the case when a person’s phone number, National Identification Number postal code, etc. are being collected. A nominal variable is one of the 2 types of categorical variables and is the simplest among all the measurement variables. Some examples of nominal variables include gender, Name, phone, etc.... Types of Variables Look at the left side of Figure below. You can see that one way to look at variables is to divide them into four different categories ( nominal , ordinal , interval and ratio ). These refer to...
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