Mode

The mode is simply the most common value, the tallest bar or highest peak in a distribution. For example, in the data set 2, 4, 4, 7, 9 the mode is 4 because it occurs twice while every other value occurs once. A data set can have no mode, one mode, or several modes, and the mode is the only center that also works for categorical data like favorite color. Unlike the mean, the mode does not require the values to be numbers.