Nominal - a type of qualitative data which groups variables into categories., Ordinal - a kind of qualitative data that groups variables into ordered categories., Interval - measured along a numerical scale that has equal distances between adjacent values., Ratio - a form of quantitative (numeric) data., Qualitative - data representing information and concepts that are not represented by numbers., Quantitative - measures of values or counts and are expressed as numbers., Discrete - Data that can only take certain values, Continuous - data that can take any value.,

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