Final answer:
The mode is the measure of central tendency that indicates the most frequently occurring value within a data set.
Step-by-step explanation:
The measure of central tendency that refers to the value that appears most frequently in a data set is the mode. While the mean is the arithmetic average of all the values, and the median is the middle value when the data is arranged in ascending order, the mode is unique in that it represents the most common value in a data set. A data set may have one mode, more than one mode (in the case of bimodal or multimodal distributions), or no mode at all if no number is repeated.