Final answer:
An example of discrete data is the number of books bought by students, which is a type of quantitative discrete data because it involves counting and can only take on certain numerical values.
Step-by-step explanation:
An example of discrete data is the number of books bought by students. Discrete data are quantitative discrete data because they result from counting and can only take certain numerical values. For instance, the number of tickets sold to a concert is a discrete data set since you count them and they can only be whole numbers. In comparison, quantitative continuous data may include fractions, decimals, or irrational numbers and result from measurements, such as the weight of backpacks with books in them or the length of phone calls.
Here's another example: If you go to the supermarket and purchase a certain number of various items, the distinct countable items (like three cans of soup, two packages of nuts, four kinds of vegetables, and two desserts) are examples of quantitative discrete data. In contrast, the weights of these cans and packages would be quantitative continuous data since they can have a continuous range of values. The colors of the items, like red or black, are qualitative data because they describe attributes rather than quantities.