In a set of data, what does the mode indicate?

The mode indicates the most frequently occurring value in a set of data. This is a key concept in statistics, where the mode helps to identify which number appears more often than others, hence showcasing a tendency or pattern within the dataset.

To find the mode, you would count how many times each value appears and determine which value has the highest frequency. For instance, in the dataset {3, 7, 3, 2, 9}, the number 3 appears twice while all other numbers appear less frequently, making 3 the mode.

Understanding the mode is particularly useful in various real-world contexts, such as determining the most popular product in sales data or identifying the most common score in a set of test results. Thus, option C accurately conveys the definition of mode in statistics.