What type of attribute is the price of a textbook considered?

The price of a textbook is considered a numerical continuous attribute because it represents a measurable quantity that can take on an infinite number of values within a given range. In this context, price can vary and is not restricted to whole numbers; for example, a textbook may cost $49.95 or $49.99, reflecting various decimal values.

Another key aspect of continuous variables is that they can be meaningfully divided into smaller intervals. Therefore, one could discuss prices not just in terms of whole dollars but also in cents, illustrating a comprehensive continuous range of values. On the other hand, categorical attributes refer to qualitative data that cannot be quantified in terms of numbers but rather classify items into groups or categories. Numerical discrete attributes, in contrast, consist of countable values that can only take specific integers. Thus, when considering the nature of textbook prices, labeling them as numerical continuous is the most accurate classification.