DATABASE FUNDAMENTALS
TYPES OF DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Quantitative
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Qualitative
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Either A or B
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None of the above
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Detailed explanation-1: -Some variables, such as social security numbers and zip codes, take numerical values, but are not quantitative: They are qualitative or categorical variables.
Detailed explanation-2: -Based on the above definitions, we decide that a US postal ZIP code is a nominal variable because it is not quantitative data that can have arithmetic operations done on it, so it cannot be discrete or continuous. It also cannot be put in a progressive order, so it is not ordinal.
Detailed explanation-3: -Nominal variables are also called categorical variables or factors. Nominal variables may be represented by numbers. If so, these numbers are used merely as labels and are not subjected to arithmetic operations. “Zip Code” is a nominal variable whose values are represented by numbers.
Detailed explanation-4: -On the other hand, various types of qualitative data can be represented in nominal form. They may include words, letters, and symbols. Names of people, gender, and nationality are just a few of the most common examples of nominal data.