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Qualitative data refers to non-numeric information that describes characteristics or qualities. It often involves categories or labels, such as marital status, which can include options like single, married, or divorced. This type of data is typically used to understand concepts, opinions, or experiences rather than to measure quantities.

Quantitative data consists of numeric values that can be measured and analyzed statistically. This type of data allows for mathematical calculations and comparisons, such as age, salary, or number of employees. It is essential for conducting statistical analyses that require numerical input to derive conclusions.

Data classification involves categorizing data into distinct types, primarily qualitative and quantitative. Understanding this classification is crucial for selecting appropriate statistical methods and analyses. In the context of the question, recognizing that marital status is a qualitative attribute helps in determining the nature of the data being examined.