Which function is used to determine the most frequently occurring number in a dataset?

The function used to determine the most frequently occurring number in a dataset is MODE. This function analyzes a series of numbers and identifies the value that appears with the highest frequency. If a dataset contains multiple values that occur at the same frequency, the MODE function will typically return the lowest of those values, although there are variations such as MODE.MULT in later versions of Excel that can return multiple modes.

In contrast, the AVERAGE function is used to calculate the mean of a set of numbers by adding them together and dividing by the count, which does not reveal frequency. The FREQUENCY function creates a frequency distribution table for a given data set but does not identify the most common individual value. Lastly, the COUNT function simply tallies the number of entries in a dataset without considering the values themselves or their frequencies.